The Science-history of the Universe, المجلد 1Current Literature Publishing Company, 1909 |
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
altho amount ancients appearance assumed astronomers atmosphere attraction axis bright brilliant celestial bodies celestial sphere century chromosphere color comet constellation Copernicus corona dark determined diameter discovered discovery disk distance E. E. BARNARD Earth Earth's surface eclipse explain fact fixed stars Galileo gravitation heat heavens heliometer Herschel Hipparchus inferior planets instrument Jupiter Kepler known Lick Observatory light lines luminous lunar magnitude Mars mass measured Mercury meteorites meteors miles Milky minute modern Moon motion move nature nebulæ Neptune Newton observations Observatory orbit parallax particles path phenomena photographic plate photosphere planet planetary planetoids pole position prism Professor Ptolemy radiation rays result revolution revolving ring satellites Saturn seen showed solar system space spectra spectroheliograph spectroscope spectrum sphere spot star clusters stellar sun-spots Sun's tail telescope temperature theory tides tion transit Tycho Tycho Brahe Uranus vapor various velocity Venus visible Yerkes Observatory
مقاطع مشهورة
الصفحة 283 - If this matter is self-luminous, it seems more fit to produce a star by its condensation than to depend on the star for its existence.
الصفحة 51 - The squares of the periods of revolution of any two planets are proportional to the cubes of their mean distances from the sun.
الصفحة 281 - I have seen double and treble nebulae variously arranged; large ones with small, seeming attendants ; narrow, but much extended lucid nebulae or bright dashes; some of the shape of a fan, resembling an electric brush issuing from a lucid point...
الصفحة 225 - Wherefore if according to what we have already said it should return again about the year 1758, candid posterity will not refuse to acknowledge that this was first discovered by an Englishman.
الصفحة 280 - In the sword of Orion are three stars quite close together. In 1656, as I chanced to be viewing the middle one of these with the telescope, instead of a single star, twelve showed themselves (a not uncommon circumstance). Three of these almost touched each other, and, with four others, shone through a nebula, so that the space around them seemed far brighter than the rest of the heavens, which was entirely clear, and appeared quite black, the effect being that of an opening in the sky, through which...
الصفحة 64 - ... vehemently suspected by this Holy Office of heresy : that is to say, that you believe and hold the false doctrine, and contrary to the Holy and Divine Scriptures, namely, that the sun is the centre of the world...
الصفحة 179 - That Mars is inhabited by beings of some sort or other we may consider as certain as it is uncertain what those beings may be."1 Deimos and Phobos.
الصفحة 44 - We know that his mind did not rest at this point—that he felt that gravitation itself must be capable of being explained, and that he even suggested an explanation depending on the action of an etherial medium pervading space. But with that wise moderation which is characteristic of all his investigations, he distinguished such speculations from what he had established by observation and demonstration, and excluded from his Principia all mention of the cause of gravitation, reserving his thoughts...
الصفحة 89 - ... the upper of course to a greater extent than the lower, and thus wholly or partially denuding the opaque surface of the Sun below.
الصفحة 89 - Herschel,' would come, on this view of the subject, to be assimilated to those regions on the Earth's surface in which, for the moment, hurricanes and tornadoes prevail — the upper stratum being temporarily carried downwards, displacing by its impetus the two strata of luminous matter beneath...