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Guide to the Moon

By: Moore, Patrick

...ronautics', read 8 ACKNOWLEDGEMENTS through the two chapters dealing with space-flight. Professor W. H. Haas, of Las Cruces, and Dr. E. J. Opik, of A... ...y 80 (R. Myer Baum, F.R.A.S.) X Mount Argieus 80 (A. L. Helm) XL View from space-ship window 81 (//. P. Wilkiin, F.R.A.S.) XII The lunar base 81 (A. L... ...ocky meteorites which would otherwise bombard the lunar surface from outer space, and make conditions there very uncomfortable. Voyaging to the moon M... ... within the next century we shall be able to set foot upon it. The idea of space-travel is far from new. It goes back to the ancient Greeks, and the s... ...s, of course, are useless. Both depend upon air for their lift, and out in space there is no air. The atmospheric blanket surrounding our world is ver... ...t our main hopes are centred. The moon is the obvious target for our first space-voyage, partly because we know so much about conditions there and par... ...; and provided that he keeps his senses, he stands on the threshold of the space age. CHAPTER 2 A PICTURE OF THE UNIVERSE THE moon is such a splendid... ...mparatively closely packed, and beyond Pluto comes a vast stretch of empty space - the absolute isola- tion of our planetary system is something we fi... ...000 light-years in diameter. It is not, however, the only one. Far away in space, so remote that their light takes millions of years A PICTURE OF THE...

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Popular Astronomy

By: Newcomb, Simon
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Planetary Theory

By: Brown, Ernest W. ; Shook Clarence A.
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Origin Of The Solar System

By: Jastrow, Robert; Cameron, A. G. W
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The Nautical Almanac 1922 : And Astronomical Ephemeris.

By: Royal Observatory At Greenwich.
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The Telescope

By: Bell, Louis
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The Stars of High Luminosity

By: Payne, Cecilia H.

...r unit mass), and exceed- ingly uncommon. The infrequency of the supergiant in space has an important bearing on its age and history, arguing for unli... ...lete survey down to a given apparent magnitude embraces a far larger volume of space for the two latter. 8 On the other hand, because of their greater... ...he novae down to a given apparent magnitude are visible throughout a volume of space a thousand times greater than for the long period variables. A su... ...de. These findings are of such significance that it is worth spending a little space on considering the matter from a rather different aspect. 7 Trump... ...the condition of the atmosphere or the sur- roundings, and is not an effect of spacereddening orsuch proc- ess. If it were otherwise the fainter stars... ... in its connection with the reddening of light in passing through interstellar space. The distribution of the reddened stars is not closely parallel w... ...can be induced by particles of appropriate size. But the thought most fatal to space reddening is that if the effect is so large for fourth- and fifth... ...he means of the classes in groups A and F are sum- marized in Table IX, I. The space number is the computed number 2 per 1,000,000 cubic parsecs. TABL... ...n the sky, and well represented in catalogues, but statistically negligible in space. 14 The A stars are important for many reasons: their position in...

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The Stars and the Mind: A Study of the Impact of Astronomical Development on Human Thought

By: Davidson, Martin

...s so small, theshadow ofthe earth stretched for an infinite distance through space. As the light of the stars seen through the shadow is not overpower... ...re, the circuit being completed in 24 hours. It is impossible in the limited space at our disposal to deal with the views of all the early Greek philo... ...astronomy would have been very much delayed. Aristotle taught that motion in space is of three kinds motion in a straight line, motion in a circle, an... ...rcular motion is natural. This fifth element, which occupies the outer- most space, was called the " aether," and is more divine than the other elemen... ...d the stars, which are eternal, intelligent, and divine, and it occupies all space from the outside limit of the universe to the moon, though it is no... ...e it. Such a vault was supposed to exist and, with the firmament, enclosed a space where are the storehouses of the rain, hail, and snow. The Book of ... ...winds ; LL the storehouses of the upper waters, of snow, and of hail ; M the space occupied by the air, within which the clouds move ; NN the waters o... ...and rightly, that because the stars showed no parallax, there must be a vast space between them and Saturn. It was a simple step from this view to the... ...nomy, the eternal and unchangeable rule of the motion of celestial bodies in space. The glory of Kepler is written in the heavens ; the advances of sc...

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Starlight

By: Shapley, Harlow.

...ific vip-w of the place of man ari$ man's earth in the expanse of time and space revealed by discoveries of modern astronomy. Many of the matters disc... ...E CURRENT THEORY OF STELLAR EVOLUTION 70 VIII. CONCERNING THE EMPTINESS OF SPACE . . 77 IX. CELKSTIAL COLLISIONS AND ENCOUNTERS 86 X. THE EARTH'S ORIG... ... OF THE STELLAR UNIVERSE CHAPTER ,,AGE XL STAR FAMILIES Ill XII. MEASURING SPACE 121 XII F. THE SIZE AND FORM OF THE MILKY WAY 128 XIV. ATTENDANTS OF ... ...tars grouped together on the surface of the sky are actually associated in space. Their relative positions are not solely an accident of pro- jection.... ...cussing the evolution of stars and planets and the measurement of sidereal space. Motions of Stars and Planets The brighter planets can be observed sl... ...heir own, and although the earth and sun are also mov- ing rapidly through space, the distances sepa- rating stars and solar system are so great that ... ...ed with partial success. [261 II IN THE SOLAR NEIGHBORHOOD IN THE part of space that we may call the neighborhood of the sun, there are hun- dreds of... ...te magni- tude, one of the faintest objects ever found. Its motion through space is the same as that of Alpha Centauri, around which it probably revol... ... of the spectrum, however, gives us only a part of the total veloc- ity in space; it gives in kilometers or miles per second the radial velocity, the ...

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The Stability of Rotating Liquid Masses

By: Lyttleton, R. A

... A = v nl I V V Ml M 2 These equations determine the requisite step 8^ (in a space of n+ 1 dimensions) from a known equilibrium configuration a t to a... ...If a particle of mass m has coordinates (#, y, z) in the rotating frame, its space velocity at any instant will be (x a>y,y +wx y z). Hence the kineti... ...f the ellipsoid (1) and we wish to find a harmonic function V defined in all space that takes these values on the ellipsoid. Let O(/x, v) denote the g... ...ion of unit density and depth ofthe form then the potential at all points of space can be written down at once as F(outside) = S-^L L^S F(inside) = X ... ...e distribution LIOUVILLE'S FORMULA 83 its potential at a general point P of space can be written down directly. In fact, if Q denotes the distance of... ...x^plp-t-^(tf + y*) = ^ (3) where, in the first instance, ^ is independent of space coordinates. But XQ nmst also be independent of time, since in a na... ...e, since in a natural equilibrium configuration p and </> depend only on the space coordinates x, y, z. Supposing now that there exists some configura... ...x, ?/, or z. But any terms not containing x, y, z can be omitted, since only space differentiations of x enter the equations of motion. Thus we may wr... ...of the first order, the contribution to the potential (at a general point of space) by the column PN may be calculated as if it were all situated at P...

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Space Astrophysics

By: Liller, William.

...x This book should be returned on or before the date last marked below. SPACE ASTROPHYSICS The University of Michigan Institute of Science and Tec... ...nd Technology Series ALLEN 'Molecular Control of Cellular Activity LILLER' Space Astrophysics SPACE ASTROPHYSICS Edited by William Liller Professor o... ...rd University McGraw-Hill Book Company, Inc. New York Toronto London 1961 SPACE ASTROPHYSICS Copyright @1961 by the McGraw-Hill Book Company, Inc. Pr... ...ysics which were either concerned with or could only be studied from outer space. The purpose of these lectures, which have now been gathered together... ...n the following pages, was twofold: first, to bring to Ann Arbor lead- ing space scientists and have them describe to the students and staff the work ... ... work in which they were currently engaged; and second, to give members of space projects at the University an opportunity to ask questions of these o... ...adiation (continued) 74 H. E. Hinteregger 5. Some Plans for Experiments in Space 96 B. Rossi 6. X-ray and Ultraviolet Radiation Measurements from Rock... ...TION III: THE INSTRUMENTATION 13. Astrostats for Astrophysical Research in Space 185 R. A. Nidey 14. Attitude Control of Artificial Satellites 205 R. ... .... Newton 15. Choice of Grating Mountings Suitable for a Monochromator in a Space Telescope 228 T. Namioka Index 269 viii Section I. The Experiments 1...

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The Solar System and Its Origin

By: Norris, Russell Henry.

...ecisive. The bodies which compose our system share a common motion through space. They are and have been per- manent companions; and it is altogether ... ... distant companions, self-luminous but faint, which share their piotion in space, and are presumably of common origin. Alpha Centauri itself has such ... ...han its brilliant associate, separated from it by 2 11' in the sky, and in spaceby at least ten thousand times the Earth's distance from the Sun. To u... ...ge it, and these are negligibly small so long as the system is isolated in space. For a planet moving in a circular orbit the angular momentum is the ... ...y, as the accurate measurement of parallax has done for great distances in space. The fundamental principle is now a matter of gen- eral knowledge. If... ...act masses of iron which fallnow and then on the Earth from interplanetary space. Paneth, from a careful study of 24 such bodies, finds an average age... ...r us and to one an- other at the same time, crowded into a small volume of space from which they have receded to their present wide dispersion. This m... .... But, if this were so, and the nebulae really moving in all directions in space, there is no reason why some of the fast-moving ones should not be fa... ...ial universe at large ad- mit of a variety of solutions. In some of these, space itself is finite (re-entrant) but is expanding growing farther round,...

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The Serial Universe

By: Dunne, J. W.

...velocity. Did I say c specks ' ? They were not specks, but waves filling all space. Photographs proved it. Worse, each ofthese wave- entities needed a... ...ional world to itself, so that no two could be together in the same ordinary space. Did I say 'waves'? I am sorry, they were specks in one and the sam... ... as a purely personal appendage as subjective as any Solipsist could desire. Space and timehad notvanished : they had 19 2-2 INTRODUCTION done worse:... ... 19 2-2 INTRODUCTION done worse: they had become interchangeable. And the c space-time 5 world of the relativists appeared to be governed throughout ... ...ich ought to have been consecutive havebecome superimposed. Waves, particles,space-time,quanta andevensense- data must, we feel, fit together in some ... ...pertain to any great-great-grandchild. Unfortunately, wecannot reach, in the space at our disposal, the ultimate ancestor; but we shall find that a gr... ... represent the original states by dots, and their intended time order by the space order in which those dots are placed in the page. That, of course, ... ...hat a few people would regard as begging a question. Is it legitimate to use space order for our first attempt at representing time order? Actually, t... ...e, but deny that they can be regarded as separated in the way that points of space are separated. Very well, our original descriptions of the three di...

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The Scientific Papers Volume I

By: William, Herschel Sir.

...racted from these valuable materials and brought within reasonable limits of space, has been given in the Introduction to the present volumes. Many in... ... ...... Ixxxiii On the electrical Fluid ........ Ixxxiii On the Existence of Space ........ Ixxxiv Continuation of the Experiments on Glass Drops . ..... ...o recognise that there must be some kind of luminous fluid here and there in space. From thence he lost interest in the scattered clusters, and after ... ... there was not one of the small stars, though I examined at least 60 in that space, which had more than a stellar diameter. A planet of one tenth the ... ... have seen it. It would be difficult to compress within reasonable limits of space an epitome of Herschel's experience in polishing specula, but it se... ...d a firm centre B. This would carry the centre of the speculum over the same space which C describes, which is the " length of the stroke " and can be... ...780. XV. On the Electrical Fluid. Read May 5, 1780. XVI. On the Existence of Space. Read May 12, 1780. XVII. Continuation of the Experiments on Glass ... ... it. This gives us the power of the Instrument. For to make '09 inch cover a space of 6 inches it is required to magnify 66f times, or neglecting frac... ... the repulsion of deflection, acts, when he was so particular as to mark the spaces taken up by the fringes of light that are seen about shadows. That...

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The Realm of the Nebulae

By: Hubble, Edwin.

... the swarm of stars which surrounds him, past the borders and across empty space, to find another stellar system the nebula Messier 31. The brightest ... ...these reasons, it defines the present extent of the observ- able region of space, and it has contributed the most sig- nificant data to the study of t... ...rnal galax- ies ; designation of individual nebulae. I. THE EXPLORATION OF SPACE .... 20 Eeceding horizons ; the theory of island universes ; the natu... ...tion of the problem, (b) the solu- tion of the problem; the inhabitants of space; the realm of the nebulae, (a) the distribution of nebulae, (6) the v... ...bulae in depth; quantitative description of the distribution; internebular space ; the observable region ; effects of red-shifts on apparent luminosit... ... 1C 342 148 XIII. NEBULAE IN THE VIRGO CLUSTER .... 164 XIV. THE DEPTHS OF SPACE 192 FIGURES 1. THE SEQUENCE OF NEBULAR TYPES .... 45 2. NEBULAR DIAME... ...68 14. VELOCITY-DISTANCE RELATION FOR CLUSTERS . . 169 15. DISTRIBUTION IN SPACE OF NEBULA WITH THE SAME APPARENT LUMINOSITY ..... 174 16. APPARENT DI... ... hold, at least approximately, as far out into 4 THE REALM OF THE NEBULJE space as the observations can be carried with existing instruments. The inv... ... which are now recognized as independent stellar systems scattered through space beyond the limits of the galactic system. These have been called extr...

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An Outline of Stellar Astronomy

By: Doig, Peter

... of knowledge of the constitution, dimensions, motions and distribution in space of the stars and nebulae. The advance to an unexpected degree in asce... ...ata of observation are first submitted, covering as far as possible in the space at disposal the observed results for dimensions, movements, luminosit... ... dwarf characteristics, which would make the class one of the commonest in space. A number of stars of an abnormal sub-dwarf kind have recently been n... ...y thousands are now known. The motion of a star may be in any direction in space, but only that component at right angles to the line of sight will be... ...used by the star's own movement and by the movement of the solar system in space. Large proper motion usually means proximity rather than great space ... ...ht years from us. The annual proper of Sirius is l"-3. THE SUN'S MOTION IN SPACE The motion of translation of the Solar system with reference to the s... ... has led to explanations being offered other than movement of the stars in space, such as downward con- vection currents in stellar atmospheres, a rel... ...small in diameter as compared with cooler giants), with perhaps systematic space motion and some effect of erroneous wave lengths of the spectral line... ...tically. 18 Stellar Astronomy KINETIC ENERGIES OF STELLAR MOTION When the space velocities of stars are derived from radial velo- cities and motions ...

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Astronomy in a Nutshell, The Chief Facts and Principles Explained in Popular Language for the General Reader and for Schools

By: Serviss, Garrett Putman, 1851-1929

...h a body. Since we happen to live on the earth, it becomes our standpoint in space, from which we look out at the others. But, if we lived on some oth... ...of the earth's situation, let the reader suppose himself to be placed out in space as far from the sun as from the other stars. Then, if he could see ... ...y, for astronomical clocks are made with dials divided into twenty-four hour spaces, and the time reckoning runs continuously from o hours to xxiv hou... ..., i. e., the sun and its attend- ant planets, occupies a disk-shaped area in space, the outlines of which would be like those of a very thin round che... ...y to the explanation we are seeking. The direction in which the axis lies in space is a fixed direction, which can be changed only by some outside for... ...s will adjust itself in such a manner as to retain its original direction in space. This tendency of a rotating body to keep its axis of rotation fixe... ...es equally to the earth, whose axis, also, maintains a constant direction in space, except for a slow THe Zodiac and Equinoxes 57 change produced by ... ...xes 59 protuberance of the earth, which makes the earth's axis turn round in space. Now, as we have said, this slow swinging round of the axis of the ... ...about 25,800 years, the axis makes one complete swing round, so that in that space of time the celestial poles describe a revolution about the poles o...

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Astronomy in the Old Testament

By: Schiaparelli, G. V. (Giovanni Virginio), 1835-1910

...troduction 5 life of the terrestrial globe as well as the shining regions of space. It dwells less on details of phenomena, and loves to contemplate g... ...scribed as 'walking in the circuit of heaven ' that is to say, the spherical space bounded by the circle which forms the limit of heaven and earth. Th... ...oah's descendants, as expounded in Genesis x. They occupy round the centre a space whose limits, for the Jews before the exile, did not exceed thirty ... ...l the mass, therefore, of the earth, including these waters, is suspended in space, and consequently rests upon nothing. 17*. The terrestrial mass, wh... ...swould wish to do (TAes. p. 1312). The Firmament, Earth, Abysses 33 ment, a space where are the storehouses (ptsaroth, thesauri) of rain, hail, and s... ...ds and fruits ' for the use of animals and men s . In the lower zone of this space, on the level of the lands and seas and round about them, are the '... ...inds ; LL the storehouses of the upper waters, of snow, and of hail; M * the space occupied by the air, within which the clouds move ; NN the waters o... ...the sun stood still in the midst of heaven and hasted not to go down for the space of about a whole day. And there was no day like that, before it or ... ...ristic shape, and the group of the Pleiades, crowded densely in such a small space, are found in the cosmography of all the peoples of the torrid zone...

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Atoms Stars and Nebulae

By: Goldberg, Leo.; Aller, Lawrence H.

...and Bok.) The voyages between stars are likely to be smoky, for interstellar space is strewn with great clouds ofdust and gas that dim and redden the ... ... would fly off in a straight line and eventually lose itself in interstellar space. Just as the earth is kept in its path by the gravitational attract... ...ut one another, which we may see from a simple analogy. Suppose we were in a space-ship in interstellar space, where there was no gravitational attrac... ...the weight of a small solid object. Since gravity would not exist inside the space ship, we could not just put the object in a scales and weigh it; so... ...vered a faint red star two degrees away which shared the same motion through space as Alpha Gentauri but was 15,000 times fainter than the sun. It is ... ...dimensions of the stars, we find that most of the stars in a given volume of space near the sun are not Introducing the Stars and Nebulae 17 only fai... ... controlled by their physical environment. Thus the light rays from galactic space carry with them vivid code messages of the climatic conditions in t... ...et, the latter just above the limit of visibility at 4102A. We note that the spaces between the lines appear black, and also that there is a remarkabl... ...ars in the Big Dipper, which form a physical cluster of stars moving through space in the same direction and with the same speed, are of this type. S...

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Applied Gyrodynamics

By: Ferry, Ervin S.

... through perpendicular to the plane of the paper. Let XX' be a line fixed in space and PO a line fixed in the body perpendicular to the axis of rotati... ...e angular acceleration. For any rigid body revolving about any axis fixed in space, themoment of inertia with respect to that axis is a constant quant... ... a rigid body rotates with an angular acceleration a, about an axis fixed in space, it must be acted upon by a torque (19): L = K& where K is the mome... ...hat : (a) The resultant torque acting on a rigid body about an axis fixed in space, equals the time-rate of change of the angular mo- mentum of the bo... ...no increase or diminution of the angular momentum of a body about an axis in space without the action of a corresponding external torque about that ax... ...of external torques, the resultant of which about any assigned axis fixed in space is zero, the angular momentum of the body relative to the assigned ... ...an- other, the total angular momentum of the system, about any axis fixed in space, will remain constant, so long as the system is acted upon by no ou... ...ve topples over, and that the period [>f the waves is constant for but short spaces of time. It has been proposed to use a gyroscope to operate this v... ...ange the direction of the spin-axis, the axle will maintain its direction in space, Art. 16. If a torque be applied in the direction represented by L,...

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Comets

By: Proctor, Mary.; Crommelin, A. C. D.

...ffer widely. Some authorities are of the opinion that comets come from outer space, while others believe that they have been ejected from the sun in t... ...e material forming the solar system was once spread over this huge volume of space, or the tidal disturbance, which the planetesimal, hypothesis suppo... ...than that of the known planetary orbits. As the sun journeys onwards through space its strong attractive power not only keeps its family of planets su... ... been interpreted by supposing that all such comets were drawn in from outer space by the sun's attraction, and prevented from returning to outer spac... ...ecognise that a comet is a flight of bodies occupying a very large extent of space. It can be shown that supposing a comet's head to be but 10,000 mil... ...venty-six years occupied by the comet in making another excursion outward in space, and returning once more to greet us in the neighbourhood of the su... ...venty-four years, during which it had travelled millions of miles outward in space, yet, obedient to the attractive power of its ruler the sun, it had... ... the sun. Then it rapidly grew smaller and fainter as it receded outwards in space, not to be seen again until 1985. However, we have not lost contact... ...E STORY OF ENCKKS COMET just what would be expected of masses moving in free space under the influence of the laws of gravitation, but Encke's comet i...

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Comets and Meteor Streams Vol. Ii

By: Porter, J. G.

... NH 3, CH 4, CO 2, solidified under the lower temperatures of interplanetary space. Solar radiation will vaporise some of the gases, leaving an outer ... ...th the Sun in one focus. In the case of an elliptical or hyperbolic orbit in space, six quantities or elements are needed to define the orbit complete... ...e orbit is defined by a, its shape by e, and the orientation of its plane in space by / and SI, while the direction of the major axis within that plan... ...han half of its period of 75 years beyond the orbit of Neptune. The orbit in space The position of the comet has so far been discussed with reference ... ...cometary perihelia are distributed at a frequency of 13-5 per unit volume of space. This would give approximately 5 million comets with perihelia insi... ...ribution of their aphelia, as this gives some indication of the direction in space from which these bodies have come. The distribution is shown in Tab... ...85 315 345 is there any apparent effect due to the motion of the Sun through space. The position of the solar apex is at A 271, & + 54 5 but if the ap... ... only be acquired in two ways either the comet approaches the Sun from outer space with a velocity of its own, or the comet has increased its velocity... ...914 III has a value of e 1 -00367, but ifcomets really came to us from outer space, we should expect a much wider range of eccentricities than this. A...

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Comets

By: Olivier, Charles P.

... many comets returned at regular intervals: "Lo! from the dread immensity of space Returning, with accelerated course, The rushing comet to the sun de... ... comet groups, which consist of several moving in almost the same orbit, but spaced at irregular intervals along it. Did not all these once form parts... ..., 64, 84, 1903. THE TAILS OF COMETS 75 bright, long, streamers, with darker spaces between. To the writer the streamers as they approach the wider en... ... faint nebulous spot preceding, estimated to be rather more than a minute of space from its brightest point. The few subse- quent observations which t... ...ng on a region in Andromeda, saw and plotted 11 telescopic meteors, within a space of 102 minutes. He turned over his results to the writer, 4 who wor... ...side. On the tail side sectors of 90 were missing from these envelopes, this space be- neath the nucleus being very dark. Similar appearances were obs... ...with his idea that comet tails encountered some sort of disturbing medium in space. The variations in the appearance of the comet were the most rapid ... ...t of the twentieth century, namely, the fall of an immense object from outer space upon the Earth. It struck in central Siberia, 8 400 miles north of ... ..., 1 who showed that if comets moved according to chance distribution through space, then more would meet the Solar System than could over- take it. Al...

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A Guide to the Constellations

By: Barton, Samuel G.; Barton, Wm H.

... the heav- enly bodies in motion. Such is not the case. They move in empty space where there is no resistance to their motions, and they will continue... ...nitude overhead, and so on. The only exception is that, because of lack of space, all of the Pleiades are represented by symbol 5. Variable stars are ... ...s form a globular cluster, 33 light years in diameter, which moves through space with a velocity of 28.6 miles a second relative to the sun. The cente... ...g Dipper, except Alkaid and Dubhe, are found to be moving together through space. A considerable number of other stars, widely scattered, have the sam... ...able number of other stars, widely scattered, have the same motion through space. One of these is Sinus in Canis Major. It is the nearest of the group... ...n the chart just west of it is about 4 degrees. Arcturus is moving through space with a velocity of 77 milesa second. The velocity of the sun in space... ...ove with greater velocities. The greatest known velocity of a star through space is 625 miles a second. Arcturus is mentioned in Job 38:32, authorized... ...ch varies irregularly from magnitude 4.0 to 4.7. The sun is moving through space with a velocity of 12 miles a second, carrying the earth and all the ... ...s the earth movesaround the sun and at the same time moves with the sun in space, its combined motion is spiral. If the motion of the sun were exactly...

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Frontiers of Astronomy

By: Hoyle, Fred

...ween pp. 224 and 225. XLI. CLUSTER OF GALAXIES IN HYDRA. XLII. THE DEPTHS OF SPACE. XLIII. THE 2OO-INCH HALE TELESCOPE. XLIV. DIAGRAM OF THE 2OO-INCH ... ...e there is no material spit stuck through the Earth we are turning freely in space, just as we are moving freely in space on our annual journey around... ... meteors. Such particles do actually exist in great numbers in the realms of space between the planets. As the Earth moves around the Sun particles ar... ...view that it comes inwards from the vast cloud of diffuse gas that fills the space between the stars the interstellar gas. On this second view the Sun... ...en been supposed thatwe possess a ready perception ofthe three dimensions of space. But this is not really so. Every student of geometry knows that it... ...in the air probably have a better intuitive grasp of the three dimensions of space than we have. But such creatures do not possess the powers of analy... ...matter, known as meteorites, sometimes plunge into the atmosphere from outer space and manage to penetrate right through to the surface of the Earth. ... ...interior. And any heat released at the surface was simply radiated away into space. The heating of the interior had to come about in a different way. ... ...many years. Among the many remaining aspects of the pore theory we have just space to discuss one more. To end with I have reserved what is perhaps th...

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The Nautical Almanac 1922 : And Astronomical Ephemeris.

By: Royal Observatory at Greenwich.
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The Nautical Almanac 1924 : And Astronomical Ephemeris for the Year

By: Not Available.
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Disk Inspector

By: Nektony

...Description: Disk Inspector is a fast, intuitive and efficient disk space analysis and organization tool with a beautiful and eye-catching interface that will be especially appreciated by demanding Mac users. The program scans the hard drive (or any other supported drive) and generates a col...

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Temperature and Oxygen Data for the Muskoka-Haliburton Study Lakes (1983 - 1984)

By: Reid, R. A.|Girard, R.|Ontario Ministry of the Environment. Water Resources Branch.
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Publications Of The Yerkes Observatory Vol VII Part III

By: Morgan, William W.
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The New Heavens

By: Ellery Hale George.
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Account of the Operations of the Great Trigonometrical Survey of India Vol. X

By: Strahan, Major G.

...8 X 10 feet is all that is absolutely required for this purpose, though more space is convenient. This room should be as close as possible to the obse... ...bove their base, and insulation from ordinary tremors is ensured. The vacant space thus left round the pillars is afterwards filled in with dry sand. ... ...certain angular quantity, the wire must be moved by the micrometer through a space representing the same angle, in order to regain coincidence with it...

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The New Heavens

By: Ellery Hale George.

...ment, instead of being scattered in all direc- tions indifferently through space, form a stratum of which the thickness is small, in comparison with i... ... These two problems are intimately related and must be studied as one.* If space permitted, it would be interesting to sur- vey the progress already a... ...phed, and the boundaries of the stellar universe have been pushed far into space, but have not been attained. Globu- lar star clusters, containing ten... ...to shrinkage. Strangely [13 ] THE NEW HEAVENS enough, their velocities in space show a correspond- ing change, increasing as they grow older or perha... ... failed to give any evidence of absorption of light in its passage through space. But in spite of this decrease, the gain of a single additional magni... ...g at the rate of 186,000 miles per second spends 160 years in crossing the space that lies between us and Betelgeuse, whose tremendous proportions the... ...ing great sun-spots, traversing ninety-three million miles of the ether of space, and penetrating deep into the earth's atmosphere. These striking phe... ...ng phenomena lead us into another chapter of physics, which limitations of space for- bid us to pursue. STELLAR CHEMISTRY Let us turn again to chemist... ...n the sun- spot spectrum by fluted bands, made up of hundreds of regularly spaced lines. Similarly magnesium and hydrogen combine as magnesium hydride...

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Publications of the Yerkes Observatory Volume VII Part Iii

By: Morgan, William W.
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Account of the Operations of the Great Trigonometrical Survey of India Xixa

By: Burrard, Colonel S. G.
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Elementary Treatise on Astronomy

By: Woodhouse, Robert.

..., the Moon is near a star previously to an occultation : for moving over a space equal to her diameter in an hour she then visibly approaches the star... ...e Sun may be supposed to move, For, if MM' be taken to represent the whole space from March 18JO to March 1811, and perpendiculars be erected re- spec... .... 34]. The intervals Mm, mm>, &a are not exactly equal, since they are the spaces through which the Sun retires each day, from his place on the meridi... ...e respectively equal, in degrees, &c. to 54' 33", 54' 31". 5, 54' 31", The spaces te, t'e', &c , or the increments of the Sun's altitude in the meridi... ...t Q, and //<2 =ME will be the height : next let the Sun recede through the space Ee the point e and the Sun will be on the meridian at/i and/7* = me [... ...n the succeeding day let the Sun, having still farther receded through the space ee'> be at /; then his place on the meridian will bey*', and his meri... ...similar circumstances will take place till the Sun has receded through the space E$ (JES a quadrant) when his place on the meridian will be at g, and ... ...e proportion of cosine of sb to radius; therefore the time of describing a space rz ab on the parallel asm is to the time of describing the same space... ...osine of sb, or as radius to cos. declination. Now, analogous to the equal spaces ab, is the constant interval of the vertical wires ; therefore, the ...

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An Elementary Treatise of the Lunar Theory

By: Godfray, Hugh.

...lf be variable, though the change must, according to our ideas of time and space, be indefinitely slow and small. 14 LUNAR THEORY. following theorem ... ...ely a numerical verification ; the data Acquired from observation are, the space fallen through from rest in 1" by bodies at the earth's surface = 16*... .... The force of the earth's attraction oc r -^ . Therefore, the (dist.) 3 * space fallen through in 1" at distance of moon by a body 1 *"! moving from ... ...280 (vers. CD) feet 00 x 4000 x 5280 x 2?r 2 = -00418 feet. Therefore, the space through which the moon is deflected in one second from her straight p... ...nce between a winter and a summer month. 14. Shew that the moon's orbit in space is always concave towards the sun. Assuming that the earth describes ... ...iano with the earth's orbit, compare the curvatures of the moon's orbit in space at her perihelion and aphelion. 15. Prove that if we go to the third ...

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The Telescope

By: Bell, Louis

...sh units. Certain branches of the subject are not here discussed for lack of space or because there is recent literature at hand to which reference ca... ... distant o a' FIG. 4. Diagram of Galileo's Telescope. object the lenses were spaced at the difference of their focal lengths, and the magnifying power... ..., though it is the basis of the micrometer. The lenses o and e are obviously spaced at the sum of their focal lengths, and as before the magnifying po... ...ne finds the first of the diaphragms, E. These are commonly 3 to 6 in number spaced about equally down the tube, and are far more important than they ... ...an outward flange /, tapped for 3 close pairs of adjusting screws as si, s\i spaced at 120 apart. The objective cell itself, b, is recessed for the ob... ...wo lenses of the achromatic objective are usually very slightly separated by spacers, either tiny bits of tinfoil 120 apart, or a very thin ring with ... ...ts, and quite usually the pair as a whole rests below on three corresponding spacers. Of each pair of adjusting screws one as 1 in the pair Sn is thre... ...the objective to make them meet in such orderly fashion even over an angular space of a single degree, and the wider the view required the more diffic... ...IG. 54. TheFraun- of the crown; hence the two must be separated er ypes * by spacers at the edge, which in small lenses in simple cells is slightly in...

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Elementary Surveying

By: Lovat, Higgins Arthur.

...lan p, the point P is fixed +x S.L - Y FIG. 1 FUNDAMENTAL PRINCIPLES 5 in space; and this is the basis of topographical surveying, which leads to a m... ...ee points plotted on the chart. (3) Method embodied in resection FIG. 6 in space in stereoscopic methods of surveying. (4) Locating positions by wirel... ...on carefully referenced. (8) Shouting instructions is bad taste. In public spaces it provokes ridicule, and in private lands annoyance or curiosity. S... ...imen page of the notes ofa chain survey, various symbols being introduced. Space will not allow discussion of the 24 ELEMENTARY SURVEYING various poi... ...in conventional ratios to the actual lengths of the corresponding lines in space. Scales may be expressed in the following three ways: (a) By a Statem... ...tion (R.F.)> such as 1 : R, the denomina- tor being the number of units in space represented by one scale unit; the in. or cm., as the case may be. Th... ...od commends itself by its simplicity, though it is somewhat extravagant of space and time, as regards obstacles of Class (a). Also, it demands extreme... ...es in the water level, a simple instrument used for transferring levels in spaces so confined that the use of any other instrument would be impossible... ... Feet are read at the tops of the red figures in line with the wider black spaces, which here, as at all tenths, denote the pointings of the secondary...

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Telescopes

By: Kuiper, Gerard. P; Middlehurst, Barbara. M

...f these three classes is described in this volume in two or more chapters. Space telescopes have at present not yet attained the full development that... ...image. Eight directions of ap- proach of the knife-edge were photographed, spaced at intervals of 45. Figur- ing was carried out by Don Hendrix with a... ...ors for the coude and Cassegrain foci, while the upper part is the working space for the observer. The prime focus is located about 30 inches above th... ... machinedand rest on pads which are accurately machined to match. Into the space between, oil is pumped at a pressure of about 300 pounds per square i... ...nch-thick steel and aluminum boxes filled with crumpled aluminum foil. The space between these two layers is vented at the top and bottom of the dome,... ...scope and Its Possibilities," Science, 69,1. HALE, G. E. 1934 "Deeper into Space," Atlantic Monthly 153, 463. MCCAULEY, G. V. 1934 "Making the Glass D... ...g, with one focus of the ellipse on the optical axis of the telescope. The space is minimal to contain the observer and auxiliary equipment. The obser... ...ptics and maintain the direction of the optical axis with high accuracy in space. The number of ways that this basic function can be performed is so l... ...shown in cross-section in Figure 1. The basic aim was to give maximum work space to the astronomer and to ac- commodate Cassegrain instruments up to 7...

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A Textbook of Practical Astronomy

By: John Nassau Jason.

... with the sun atone ofthe foci. As viewed from a far-off northern point in space, they move about 1 PRACTICAL ASTRONOMY the sun in a counterclockwise... ...a counterclock- wise direction (as viewed from a far-off northern point in space). This is the direction from west to east. 3. Its mean density is abo... ...o occupy the center of this sphere. In reality, the stars are scattered in space and we, in their midst, project their images on this imaginary sphere... ... wires are horizontal. Now see if the image of the second mark bisects the space between the parallel wires. If so, the telescope is adjusted; if not,... .... The circle of the theodolite is usually graduated into *-J M FIG. 43. 5' spaces and when the microscope is properly adjusted five turns of the screw... ... is properly adjusted five turns of the screw will move the wires over one space. Hence, one complete revolution of the screw carries the parallel wir... ...n as the error of runs and is determined from time to time by measuring 5' spaces in different parts of the circle. To illustrate, let the average rea...

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Essentials of Aerial Surveying : And Photo Interpretation

By: Abrams, Talbert.

...e numbers represents the third digit. The fourth digit can be estimated. The spaces Fio. 2. Slide rule, unassembled. between the second digits are div... ... south of the equator. N.R x ^_ . 'qua tor S.P, FIG. 52. Cylindrical equally spaced projection. Another type of cylindrical projection is one in which... ...ection is one-half the circumference of the globe. The meridians are equally spaced or kept to a uniform spacing by FIG. 53. Conical projection. makin... ...employs a central meridian and a central parallel. The meridians are equally spaced and parallel, and the parallels of latitude increase in interval t... ... line is made heavy and the first water line as close as possible to it. The spaces between water lines gradually widen, each space having 11 times th... ... lines gradually widen, each space having 11 times the width of the previous space. This work is done freehand with a crow-quill pen. Use a contour pe... ...ke any piece of cardboard or paper and lay off on it, to any scale, about 10 spaces. Then place the zero point on this scale on point A. Then draw a l... ...this rule: The steeper the slope, the heavier the symbol and the smaller the space between symbols. Characteristics of Contours. The chief characteris... ...ctions, as at D. Such cases seldom occur. 5. On a uniform slope contours are spaced equally, as at E. 6. On a plane surface they are straight and para...

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