Celestial Objects for Common Telescopes |
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Common terms and phrases
appearance astronomers atmosphere averted vision beautiful Beer and Mädler binary bluish BOÖTES bright brighter brilliant Cassini centre cloud cluster colour comet common proper motion common telescopes conspicuous constellation craters curious Dawes deep Dembowski diameter disc distance Donati's Comet Dorpat Double Stars Earl of Rosse Earth eye-piece faint feet achromatic Galaxy globe Gruithuisen heavens Herschel inches aperture instruments interior Jupiter larger Lassell libration light lilac limb low power low-power field luminous lunar magnifying meridian miles minute stars Moon mountains naked eye nearly nebula noticed nucleus object object-glass orange pair pale blue pale grey pale white pale yellow perceived planet planetary nebula probably proper motion reflector region remarkable ring satellite Schröter Schwabe Secchi seen shadow shew side smaller smalt blue solar solar eclipses sometimes speculum streaks surface variable variable stars Venus violet visible to naked wall yellowish
Popular passages
Page 39 - Fairest of stars, last in the train of night, If better thou belong not to the dawn, Sure pledge of day, that crown'st the smiling morn With thy bright circlet, praise him in thy sphere, While day arises, that sweet hour of prime.
Page 153 - Lift up your eyes on high, and behold who hath created these things, that bringeth out their host by number : he calleth them all by names, by the greatness of his might, for that he is strqng in power ; not one faileth.
Page xii - I will only add my firm belief, that every advance in our knowledge of the natural world will, if rightly directed by the spirit of true humility and with a prayer for God's blessing, advance us in our knowledge of Himself, and will prepare us to receive his revelation of his will with profounder reverence.
Page 28 - Once I saw, with a 12-inch reflector, a spot burst in pieces while I was looking at it I could not expect such an event, and therefore cannot be certain of the exact particulars ; but the appearance, as it struck me at the time, was like that of a piece of ice when dashed on a frozen pond, which breaks in pieces, and slides on the surface in various directions. I was then a very young astronomer, but I think I may be sure of the fact...
Page 5 - ... either side of it. A proper test-object must be chosen : the Moon is too easy ; Venus too severe, except for first-rate glasses ; large stars have too much glare; Jupiter or Saturn are far better; a close double star is best of all for an experienced eye ; but for general purposes a moderate-sized star will suffice. Its image in focus, with the highest power, should be a very small disc, almost a point, accurately round ; without
Page 125 - On the 28th of January, 1848, during the transit of the shadows of the first and third satellites, the third satellite itself was seen with the great refractor under very beautiful definition, as a black spot between the two shadows, and not to be distinguished from them except by the place it occupied. It was smaller than its shadow in the proportion of 3 to 5, not duskish simply, but quite black like the shadows.
Page 39 - The intense lustre of its illuminated part dazzles the sight, and exaggerates every imperfection of the telescope; yet we see clearly that its surface is not mottled over with permanent spots like the moon ; we perceive in it neither mountains nor shadows, but a uniform brightness, in which sometimes we may, indeed, fancy obscurer portions, but can seldom or never rest fully satisfied of the fact.
Page 28 - ... groups. This is, I believe, an instance of devoted persistence (if the word were not equivocal, I should say, pertinacity) unsurpassed in the annals of astronomy. The energy of one man has revealed a phenomenon that had eluded even...
Page 222 - Lactea and off it, awaken still more our admiration of the stupendous richness of the Universe, in every department of which there appears such a profusion of creation, if we may so express ourselves of the works of the ALMIGHTY, in which our utmost ken has yet never detected any redundancy, much less anything made in vain.
Page 27 - I have said, he spent to satisfy himself; six more years to satisfy, and still thirteen more to convince, mankind. For thirty years never has the Sun exhibited his disc above the horizon of Dessau without being confronted by Schwabe's imperturbable telescope, and that appears to have happened, on an average, about 300 days a year.