Fourteen Weeks in Descriptive Astronomy |
From inside the book
Results 1-5 of 18
Page 48
... luminous surface of the sun when at its average ( mean ) distance by 1000 , the same sur- face will be represented to us when in aphelion ( July ) by 940 , and when in perihelion ( January ) by 1072 . DIMENSIONS . - Its diameter is ...
... luminous surface of the sun when at its average ( mean ) distance by 1000 , the same sur- face will be represented to us when in aphelion ( July ) by 940 , and when in perihelion ( January ) by 1072 . DIMENSIONS . - Its diameter is ...
Page 53
... luminous atmos- phere of the sun , what an abyss must that be at " the bottom of which our earth could lie like a boulder in the crater of a volcano ! " The spots consist of distinct parts . From the ac- companying representation it ...
... luminous atmos- phere of the sun , what an abyss must that be at " the bottom of which our earth could lie like a boulder in the crater of a volcano ! " The spots consist of distinct parts . From the ac- companying representation it ...
Page 59
... luminous surface . -This was thought probable before , but is conclu- sively proved by the photographs of the sun , which have been taken in large numbers of late at Kew Observatory . Comparative brightness of spots and sun . — If we ...
... luminous surface . -This was thought probable before , but is conclu- sively proved by the photographs of the sun , which have been taken in large numbers of late at Kew Observatory . Comparative brightness of spots and sun . — If we ...
Page 60
... coarse . Under a large telescope the surface seems to be entirely made up of luminous masses , imperfectly separated by dark dots called pores . These masses are said by Mr. Nasmyth to have a " willow -. 60 THE SOLAR SYSTEM .
... coarse . Under a large telescope the surface seems to be entirely made up of luminous masses , imperfectly separated by dark dots called pores . These masses are said by Mr. Nasmyth to have a " willow -. 60 THE SOLAR SYSTEM .
Page 61
... luminous surface , and also the " bridges " Fig . 12 . WILLOW - LEAF . spanning the solar spot . Indeed , it is said that the spots themselves always have their origin in a " pore , " which appears to slowly increase and as- sume the ...
... luminous surface , and also the " bridges " Fig . 12 . WILLOW - LEAF . spanning the solar spot . Indeed , it is said that the spots themselves always have their origin in a " pore , " which appears to slowly increase and as- sume the ...
Other editions - View all
Common terms and phrases
ancients Andromeda angle aphelion appear Aries astronomers atmosphere axis Boötes bright brilliant Canis Minor Capricornus Cassiopeia cause Celestial Sphere centre Cepheus circle color comet conjunction constellation Cor Caroli dark density Describe diameter disk earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavenly bodies heavens Hercules Herschel horizon inclined inferior conjunction inferior planet Jupiter latitude length light luminous lunar Lyra magnitude Mars mean distance Mercury meridian meteors miles moon's motion move naked eye nearly nebula Neptune night node north pole Orion parallax pass path penumbra perihelion Perseus Pisces polar Polaris precession rays revolve ring rising Saturn seasons seen shine side sidereal sidereal day solar day solar system solstice space spots summer sun's surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major Ursa Minor varies velocity Venus vernal equinox visible winter Zodiac