Fourteen Weeks in Descriptive Astronomy |
From inside the book
Results 6-10 of 34
Page 50
... telescope of moderate power , taking the precaution to properly shield the eye with a colored eye - piece , we shall find its surface sprinkled with irregular spots , somewhat as shown in the accompanying figure . Curious opinions ...
... telescope of moderate power , taking the precaution to properly shield the eye with a colored eye - piece , we shall find its surface sprinkled with irregular spots , somewhat as shown in the accompanying figure . Curious opinions ...
Page 51
... TELESCOPE . Discovery of the solar spots . - They seem to have been noticed as early as 807 A. D. , although the tel- escope was not invented until 1610 , and Galileo dis- covered the solar spots in the following year . We read in the ...
... TELESCOPE . Discovery of the solar spots . - They seem to have been noticed as early as 807 A. D. , although the tel- escope was not invented until 1610 , and Galileo dis- covered the solar spots in the following year . We read in the ...
Page 58
... telescope , he turned away for a moment , and on looking back it was gone . X The appearance of the spots is periodical . — It is a re- markable fact that the number of spots increases and diminishes through a regular interval of about ...
... telescope , he turned away for a moment , and on looking back it was gone . X The appearance of the spots is periodical . — It is a re- markable fact that the number of spots increases and diminishes through a regular interval of about ...
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 72
... telescope . ARE THE PLANETS INHABITED ? —This question is one which very naturally arises , when we think of the planets as worlds in so many respects similar to our own . We can give no satisfactory answer . Many think that the only ...
... telescope . ARE THE PLANETS INHABITED ? —This question is one which very naturally arises , when we think of the planets as worlds in so many respects similar to our own . We can give no satisfactory answer . Many think that the only ...
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