Descriptive Astronomy |
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Page 8
... minutes ; but a few days or weeks will commonly be found the usual extent of permanency . Some are formed and vanish during the period of a single transit ( rather more than 12 days ) , others remain during several successive transits ...
... minutes ; but a few days or weeks will commonly be found the usual extent of permanency . Some are formed and vanish during the period of a single transit ( rather more than 12 days ) , others remain during several successive transits ...
Page 13
... minute pores or dots which stipple the Sun's surface , and which begin to increase , to assume an umbral blackness , and acquire a visible and , at first , very irregular and changeable shape . It is not till it has attained some ...
... minute pores or dots which stipple the Sun's surface , and which begin to increase , to assume an umbral blackness , and acquire a visible and , at first , very irregular and changeable shape . It is not till it has attained some ...
Page 17
... minutes , during which time they traversed a space of about 33,700 miles . The brilliancy of the light was dazzling in the extreme ; but the most noteworthy circumstance was the marked disturbance which ( as was afterwards found ) took ...
... minutes , during which time they traversed a space of about 33,700 miles . The brilliancy of the light was dazzling in the extreme ; but the most noteworthy circumstance was the marked disturbance which ( as was afterwards found ) took ...
Page 47
... minute hands . It had been his faithful companion in his professional journeys , he said ; but that would hardly be ... minutes , dare you talk of estimating seconds ? My suspicions are already too well founded . ' To this Lescarbault ...
... minute hands . It had been his faithful companion in his professional journeys , he said ; but that would hardly be ... minutes , dare you talk of estimating seconds ? My suspicions are already too well founded . ' To this Lescarbault ...
Page 48
... minutes on it when compared with the doctor's letter , detecting which , the savant declares that the observation has been falsified . An error in the watch regulated by sidereal time accounts for this . Le Verrier now wishes to know ...
... minutes on it when compared with the doctor's letter , detecting which , the savant declares that the observation has been falsified . An error in the watch regulated by sidereal time accounts for this . Le Verrier now wishes to know ...
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Common terms and phrases
angle angular apparition April Arago astronomers atmosphere axis bright Cassini Cassiopeia Catalogue centre circle cluster colour comet appeared comet was seen constellation Dawes Decl diameter disc discovered discovery double stars Earl of Rosse Earth eclipse Encke epoch equator equatorial equinox eye-piece globular cluster Halley's comet heavens Herculis Herschel Hind hour Hydræ inches inferior conjunction inferior planets instrument John Herschel July June Jupiter Lassell Leonis light longitude lunar Ma-tuoan-lin Mädler Mailla March Mars mean distance Mercury meridian meteors miles minor planets Month Moon Moon's motion naked eye nebula node object orbit parallax passed perihelion period Phil Pingré planet proper motion refraction remarkable right ascension ring rotation satellites Saturn Schröter Sept shew sidereal solar spots star otherwise called Sun's surface tail telescope Trans transit Uranus Ursa Venus visible weeks ΙΟ
Popular passages
Page 315 - For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God...
Page 314 - So spake the grisly terror ; and in shape, So speaking, and so threatening, grew ten-fold More dreadful and deform : on the other side, Incensed with indignation, Satan stood Unterrified, and like a comet burned, That fires the length of Ophiuchus huge In the Arctic sky, and from his horrid hair Shakes pestilence and war.
Page 452 - In the first month, on the fourteenth day of the month at even, ye shall eat unleavened bread, until the one and twentieth day of the month at even.
Page 66 - While the earth remaineth, seedtime and harvest, and cold and heat, and summer and winter, and day and night shall not cease.
Page 31 - The squares of the periodic times of the planets are proportional to the cubes of their mean distances from the sun.
Page 795 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.
Page 184 - I did not remark any beams projecting from it which deserved notice as much more conspicuous than the others ; but the whole was beamy, radiated in structure, and terminated (though very indefinitely) in a way which reminded me of the ornament frequently placed round a mariner's compass. Its colour was white, or resembling that of Venus.
Page 244 - ... properly adjusted at every instant to that of the ball, while preserving its inclination to the horizon, so that when the ball in its natural descent reached C, the tube should have been carried into the position...
Page 124 - Saturn, perhaps, devoured his children ? Or were the appearances indeed illusion or fraud, with which the glasses have so long deceived me as well as many others to whom I have shown them...