单词 | mean distance |
例句 | Upon his return there was now enough information for the French astronomer Joseph Lalande to calculate that the mean distance from the Earth to the Sun was a little over 150 million kilometers. A Short History of Nearly Everything 2003-05-06T00:00:00Z For each planet in our solar system, look up the mean distance from the Sun in AU and the orbital period in years and overplot these data on the theoretical Keplerian curve. Astronomy 2016-10-13T00:00:00Z Each was given the task of estimating the mean distance that shoppers live from the mall. Introductory Statistics 2013-09-19T00:00:00Z Use the result from the previous exercise to determine the time required for Venus to orbit the Sun if its mean distance is 108 million kilometers. Algebra and Trigonometry 2015-02-13T00:00:00Z That does not mean distance learning is a failure. Editorial Roundup: New York 2020-05-27T04:00:00Z By feel, I mean distance control: the ability to look at a putt, make a few practice strokes, and then put the right amount of hit on it. Eliminate Three-Putts - Golf Digest 2018-02-08T05:00:00Z The authority, in its defense, points out that the current rate remains a staggering improvement from 1981, when the mean distance between failures was 7,000 miles. No ‘Fairy Godmother’ for the Subway: When $100 Billion Isn’t Enough 2017-05-22T04:00:00Z Ms. Hakim said the reliability of trains, known as mean distance between failure, had dropped because it had reached an artificially high level when a large order of new subway cars arrived in 2010. Subway’s Slide in Performance Leaves Straphangers Fuming 2017-02-12T05:00:00Z One AU, or astronomical unit, is the mean distance from the sun to Earth. A Pair of Stellar Newborns Shine Brightly 2013-11-01T14:15:00.517Z There seems to be a slight tendency for large inclinations and great eccentricities to go together; but there appears to be no connection between the eccentricity and the mean distance from the sun. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z First, the mean distance of the satellite from its primary, and second the time of revolution round it. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z About noon we left Port Xavier, and coasted the island, at the mean distance of a mile, examining it for anchorages, until, after a run of eight miles, we reached its south point. Narrative of the surveying voyages of His Majesty's ships Adventure and Beagle, between the years 1826 and 1836 Volume I. - Proceedings of the First Expedition, 1826-1830 2012-02-24T03:00:32.793Z Taking the mean of these values, its distance from the earth would be about 460,000 times the earth's mean distance from the sun, and its actual velocity about 33 miles per second. Scientific American Supplement, No. 648, June 2, 1888. 2011-12-26T03:00:15.410Z As the orbit of the planet widens, and its mean distance from the primary becomes greater, its velocity in its orbital path must correspondingly decrease. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z He thought this hypothetical planet would be considerably larger than Jupiter, and probably revolve round the sun at a distance of about 100 times the earth’s mean distance from the sun. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z Also the mean distances of stars thrown into classes according to their spectral type have been investigated by Boss, Kapteyn, Campbell and others. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z For the 37 opossums caught at two, three or four different trapping stations, the mean distance was 817 feet; this is an indication of home ranges of approximately 48 acres in extent. Ecology of the Opossum on a Natural Area in Northeastern Kansas 2011-08-26T02:00:22.450Z It is almost twice the size of the Moon in actual diameter, but as its mean distance from the Earth is 600 times that of the Moon, its mean apparent diameter is 300 times smaller. Are the Planets Inhabited? 2011-04-24T02:00:07.733Z So that they were driven backwards and forwards from one trouble to the other, until they had discovered a mean distance at which they could most tolerably exist.' Group Psychology and The Analysis of The Ego 2011-04-17T02:00:02.907Z His "Harmonies of the World" contained his third great law: "The squares of the periodic times of the planets are proportioned to the cubes of their mean distances from the sun." Famous Men of Science 2011-03-08T03:00:49.717Z We shall find by solving this equation that a, the mean distance of the sun from the earth, is very approximately 93,000,000 miles. A Text-Book of Astronomy 2011-01-05T03:00:57.347Z “But that doesn’t apply to mean distance between failures, which is a factor of how old or new the car is, and how well maintained it is,” he added. Trains With Dedicated Tracks Top Subway Rankings 2010-10-06T19:20:00Z But at aphelion it retreats deep into the region of the asteroids, and is much more than four times the mean distance of the Earth. Are the Planets Inhabited? 2011-04-24T02:00:07.733Z It states that the squares of the periods of circulation round the sun of the several planets are in the same ratio as the cubes of their mean distances. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" By various methods the sun's mean distance has been ascertained within very small limits of error, and found to be nearly 93,000,000 miles. The New Gresham Encyclopedia. Vol. 1 Part 2 Amiel to Atrauli The squares of the periodic times of the planets are proportional to the cubes of their mean distances from the sun. A Text-Book of Astronomy 2011-01-05T03:00:57.347Z The mean distance for movement for all individuals recaptured was 72 feet. Field Study of Kansas Ant-Eating Frog The actual planet was found to have a mean distance less than this by 25 per cent., an enormous quantity in such a case. Astronomical Discovery If A1, C1 are the disks, so that the distance between them is less than πr, the curve must be produced beyond the disks before it is at its mean distance from the axis. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" Another group, known as the 'Trojan Planets', has been found, whose mean distances are practically identical with that of Jupiter. The New Gresham Encyclopedia. Vol. 1 Part 2 Amiel to Atrauli What are the mean distances of Mercury, Venus, and Mars? A Text-Book of Astronomy 2011-01-05T03:00:57.347Z The mean distance to the Potomac was some six miles, and the enemy was between Meade and the river. The Battle of Gettysburg That the mean distance of the planet cannot be less than 35 or more than 37.9. Astronomical Discovery Hence in this case the mean distance is less than r, and the pressure will be greater than T/r. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" That the squares of the times of the revolutions of the planets are as the cubes of their mean distances from the sun. The New Gresham Encyclopedia. Vol. 1 Part 2 Amiel to Atrauli What is its mean distance from the sun? A Text-Book of Astronomy 2011-01-05T03:00:57.347Z It travels at a mean distance of four feet above the surface of the planet, at a velocity yet to be calculated. The Holes Around Mars The mean distance of the Earth from the Moon—that is to say, from the heavenly body in our closest vicinity—is 237,000 miles. Eureka: A Prose Poem The mean distance will therefore be greater than r, and the pressure will be less than T/r. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" The distance of the moon from the earth is not always the same; but the average, or mean distance, amounts to about two hundred and thirty-eight thousand eight hundred and twenty-eight miles. Eighth Reader Out of the 13 largest planetoids whose apparent brightnesses exceed that of a star of the 9·5 magnitude, there is not one having a mean distance that exceeds 3. Essays: Scientific, Political, & Speculative, Vol. I Then he suddenly let him loose and despatched him with a kick to no mean distance, and, still pursuing his victim, he there sat upon him. The Story of Don Quixote The mean distance and period of revolution of every planet is unalterable in the long run. The Machinery of the Universe Mechanical Conceptions of Physical Phenomena Vulcan, the smallest and innermost of the planets, circles the sun with great rapidity at a mean distance of twenty million miles. Vulcan's Workshop A decrease in excentricity means an increase in mean distance of the earth from the sun. Pioneers of Science Of those between 10 and 10·5 there are 17; and of these also there is one exceeding 3 in mean distance. Essays: Scientific, Political, & Speculative, Vol. I The companion is only of the tenth magnitude, and revolves around Sirius in a period of about fifty years, at a mean distance equal to about that of Uranus from the sun. Astronomy of To-day A Popular Introduction in Non-Technical Language The periodic time of a planet having been ascertained, the square of the mean distance and the mean distance itself can be obtained. The Astronomy of Milton's 'Paradise Lost' The quantity to be determined, or "mean distance," is that lying midway between these extremes—is, in other words, half the major axis of the ellipse in which the earth travels. A Popular History of Astronomy During the Nineteenth Century Fourth Edition The moon's distance from the earth is generally given as being about 238,000 miles, but this is its mean distance. To Mars via The Moon An Astronomical Story In the next group there are 37, and of these 5 have this great mean distance. Essays: Scientific, Political, & Speculative, Vol. I The simplest way of finding the mean distance is to add the greatest of these quantities to the least, and take half the sum. The Story of the Heavens ‘The squares of the periodic times of any two planets are proportional to the cubes of their mean distances from the Sun.’ The Astronomy of Milton's 'Paradise Lost' The mean distance apart of the component stars, as now ascertained, is just twenty-two million miles, and their joint mass quadruples that of the sun. A Popular History of Astronomy During the Nineteenth Century Fourth Edition The squares of the periodic times of the planets are to each other as the cubes of their mean distances from the sun. The Sailor's Word-Book An Alphabetical Digest of Nautical Terms, including Some More Especially Military and Scientific, but Useful to Seamen; as well as Archaisms of Early Voyagers, etc. Of those having magnitudes at least 9·5 and smaller than 10, there are 15; and of these one only has a mean distance greater than 3. Essays: Scientific, Political, & Speculative, Vol. I That relation is stated in the following words:— "The squares of the periodic times are proportional to the cubes of the mean distances." The Story of the Heavens Stars of the second magnitude have a mean distance of fifty-eight light years, those of the third magnitude ninety-two years, and so on. The Astronomy of Milton's 'Paradise Lost' At the mean distance concluded for these ten brilliant stars, the sun would show as of only fifth magnitude; hence it claims a very subordinate rank among the suns of space. A Popular History of Astronomy During the Nineteenth Century Fourth Edition The sun, with its huge form, occupies the centre of the solar system, while Mercury has its mean distance about 36,000,000 miles away. Aether and Gravitation Hence h = c, or the mean height of the figure is equal to the mean distance between the dents. Scientific American Supplement, No. 1082, September 26, 1896 Under certain circumstances it will have a distance from the earth not exceeding one-seventh of the mean distance of the sun. The Story of the Heavens The periodic time of each revolution, and the mean distance at which that revolution was performed, will be always connected together by the formula of Kepler. Time and Tide A Romance of the Moon The present distance from the sun is, therefore, thirty times the earth's mean distance;—which is somewhat less than the theory had indicated. A Budget of Paradoxes, Volume I The squares of the periodic times of planets are proportional to the cubes of their mean distances. Aether and Gravitation The mean distance of all the faint stars is 1.0 sir. Lectures on Stellar Statistics If we employ the best value of the earth's equatorial radius we obtain 92,870,000 miles as the mean distance of the centre of the sun from the centre of the earth. The Story of the Heavens Indeed, I am here only stating what every one is familiar with under the form of Kepler's Law, that the square of the periodic time is in proportion to the cube of the mean distance. Time and Tide A Romance of the Moon And ten miles to a boy and dog who have appeased their hunger for three days with two small birds, is no mean distance. The Blue Envelope So that by Kepler's Third Law, if we have the periodic time of any two planets, and the mean distance of either, we can find out the mean distance of the other by simple proportion. Aether and Gravitation When dealing with distances in our planetary system, the astronomers, since the time of Newton, have always used the mean distance of the earth from the sun as universal unit of distance. Lectures on Stellar Statistics He saw that the mean distance did not alter, but it remained to be seen whether the eccentricity of the ellipse described by the earth might not be affected by the perturbations. The Story of the Heavens If the idea be just, our theory offers an explanation of the great differences observable in the mean distances of these bodies, and which would otherwise form a strong objection against the hypothesis. Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence It will thus be seen that, although all the other asteroids are situated beyond Mars, Eros, at its mean distance, is nearer to the sun than Mars is. Other Worlds Their Nature, Possibilities and Habitability in the Light of the Latest Discoveries If the sun were stationary in space, then the mean distance, that is, the length of the imaginary straight line joining the sun S A to the earth, would remain unaltered. Aether and Gravitation The mean distance of these stars is as large as 7.5 sir. Lectures on Stellar Statistics From this it appears that the angle which the earth's equatorial radius subtends at the centre of the sun when at its mean distance has the value 8´´·802. The Story of the Heavens For if these little planets be fragments, there will be differences of density according as they belonged to the central or superficial parts of the quondam planet, and their mean distances must consequently vary also. Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence For any other planet besides the earth the velocity of explosion corresponding to the different cases would vary in the inverse ratio of the square root of the mean distance. Other Worlds Their Nature, Possibilities and Habitability in the Light of the Latest Discoveries Kepler by his Third Law showed that the chief regulating factor in the orbital velocity of a planet was its mean distance from the sun. Aether and Gravitation This is a consequence of the fact that the mean distance of these stars is equal to one siriometer, at which distance m and M, indeed, do coincide. Lectures on Stellar Statistics Kepler's third law establishes a relation between the mean distances and the periodic times of the various planets. The Story of the Heavens At the planet’s mean distance, the circular velocity of the vortex is equal to the circular velocity of the planet, and, at different distances, is inversely in the sub-duplicate ratio of those distances. Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence Angle subtended by one degree of selenographical latitude and longitude at the centre of the moon's disc, when at its mean distance - 16.566 sec. The Moon A Full Description and Map of its Principal Physical Features That this is exactly in accordance with observation and experience may be proved by considering the respective mean distances and orbital velocities of the various planets. Aether and Gravitation The eccentricity, according to Proctor, in some cases may attain such extremes as to bring the little world inside Mars' mean distance from the sun. The Birth-Time of the World and Other Scientific Essays Before stating this law, it is necessary to explain exactly what is meant by the mean distance of a planet. The Story of the Heavens If then, we cannot trust the parallax of Mars, à fortiori, how can we trust the parallax of Jupiter, and say that his mean distance exactly corresponds to his periodic time? Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence The only houses were log ranches, called Relays, hardly visible in their sandy surroundings, and separate from each other by a mean distance of ten miles. All Around the Moon It would appear from the latest determinations of their elements, that the small planets have the following order with respect to mean distance from the Sun: Flora, Iris, Vesta, Hebe, Astrea, Juno, Ceres, Pallas. COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 The mean distance apart will be about twenty to twenty-five miles. The Art of War It was easily found that it would not be true to say that the periodic time is merely proportional to the mean distance. The Story of the Heavens In this light we may look for comets having a mean distance corresponding to the intervals of the planets, rather than to the distances of the planets themselves. Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence A mean distance of a hundred yards from the coast was, whilst the circuit was made, preserved. Original Letters and Biographic Epitomes The whole length of the land is shut in by two ranges of hills, roughly parallel at a mean distance of about twelve miles. The World's Greatest Books — Volume 11 — Ancient and Mediæval History Half-way between the apses lay the mean distance, and at this position the error was half the distance between the ellipse and the circle, amounting to .00429 of a radius. Kepler If we denote the mean distance of the earth from the sun by unity then the mean distance of Venus from the sun is 0·7233. The Story of the Heavens Regarding then, that a comet’s mean distance depends on its mean atomic density, as in the case of the planets, the undue enlargement of their orbits by planetary perturbations is inadmissible. Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence On the orbit of the moon, at its mean distance from the earth, each of these straight sides would be about 6,000 feet long. Scientific American Supplement, No. 531, March 6, 1886 Its diameter is seventy thousand miles, its mean distance from the sun nearly eight hundred and eighty millions of miles, and its year, or periodical revolution round the sun, nearly twenty-nine years and a half. The Gutenberg Webster's Unabridged Dictionary Section S The diameter of the moon is 2,160 miles, its mean distance from the earth is 240,000 miles, and its mass is one eightieth that of the earth. The Gutenberg Webster's Unabridged Dictionary Section M, N, and O We can prove that the squares of the periodic times must be proportional to the cubes of their mean distances. The Story of the Heavens When the angle between the perihelion and the nearest node increases, the mean force of the radial stream is diminished, and the mean distance is diminished also. Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence This precious weapon of American origin could throw with ease a conical projectile of nine pounds to a mean distance of ten miles. Twenty Thousand Leagues under the Sea Then the whole work was recalculated from the beginning, with more exactness, and assuming a smaller mean distance. History of Astronomy It is in fact the mean distance from the centre of suspension of every atom, in a ratio which happens not to be an arithmetical one. A Catechism of the Steam Engine The latter has a mean distance from the sun slightly greater than that of Jupiter, while the mean distance of Eros is less than that of Mars. Curiosities of the Sky When the angle is 90°, the effect is least, and the mean distance least. Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence It says: 'The squares of the periodic times of the planets are always in the same proportion as the cubes of their mean distances from the sun.' Man or Matter A group of four asteroids has lately been found, with a mean distance and period equal to that of Jupiter. History of Astronomy It has been calculated that the Whites, advance every year a mean distance of seventeen miles along the whole of this vast boundary. The Fifteen Decisive Battles of the World: from Marathon to Waterloo It is a singular and unexpected fact that sailors are inferior to landsmen in their mean distance of distinct vision. The Descent of Man We may also conceive, that the continual siftings which the nucleus undergoes at each successive perihelion passage, have left but little of those lighter elements in comets whose mean distances are so small. Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence Let us assume the mean distance of 60 diameters in the syzygies; and suppose one revolution of the moon, in respect to the fixed stars, to be completed in 27d. 7h. A History of Science — Volume 2 The angle ASP is the anomaly when the planet is at P. CA or a line drawn from S to D is the mean distance of the planet from the sun. History of Astronomy They examined it closely, and concluded it must be Hilda, put down in the astronomies as No. 153, and having almost the greatest mean distance of any of these small bodies from the sun. A journey in other worlds A romance of the future In 1844, assuming a circular orbit, and a mean distance agreeing with Bode’s law, he obtained a first approximation to the position of the supposed planet. History of Astronomy |
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