Fourteen Weeks in Descriptive Astronomy |
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Page 273
... nebula are about to arrive . " Nebulæ are divided , according to their form , into six classes - elliptic , annular , spiral , planetary , irregu- lar nebulae , and nebulous stars . Fig . 83 . The elliptic , or merely oval nebulæ , are ...
... nebula are about to arrive . " Nebulæ are divided , according to their form , into six classes - elliptic , annular , spiral , planetary , irregu- lar nebulae , and nebulous stars . Fig . 83 . The elliptic , or merely oval nebulæ , are ...
Page 274
... nebulae have the form of a ring . There are but four of these " ring universes . " In Fig . 84 . NEBULA IN LYRA . the cut is a representation of one in Lyra - first as seen by Herschel , and having in the centre a nebu- lous film like a ...
... nebulae have the form of a ring . There are but four of these " ring universes . " In Fig . 84 . NEBULA IN LYRA . the cut is a representation of one in Lyra - first as seen by Herschel , and having in the centre a nebu- lous film like a ...
Page 277
... nebulae are those which have no definite form . Many of them present all the irregularities of clouds torn and rent ... nebula " in the constellation Vul- pecula , and the " crab nebula " near the southern horn of Taurus . There is also ...
... nebulae are those which have no definite form . Many of them present all the irregularities of clouds torn and rent ... nebula " in the constellation Vul- pecula , and the " crab nebula " near the southern horn of Taurus . There is also ...
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ancients angle aphelion appear astronomers atmosphere axis bright brilliant called Capricornus Cassiopeia Celestial Sphere centre circle color comet conjunction constellation Cor Caroli dark density diameter disk earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavenly bodies heavens Hercules Herschel horizon inclined inferior inferior conjunction inferior planet Jupiter latitude length light longitude luminous lunar magnitude Mars mean distance measured Mercury meridian meteors miles moon moon's motion move naked eye nearly nebula Neptune night node north pole obliquity observer orbit parallax pass path penumbra perihelion Perseus planet polar position rays revolve Right Ascension ring rotation satellites Saturn seasons seen shadow shine side sidereal sidereal day solar system space spots summer sun's superior planet supposed surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major varies velocity Venus vernal equinox visible zenith zodiac