Fourteen Weeks in Descriptive Astronomy |
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Page 63
... penumbra . We can readily Fig . 13 . DARK nucleus EARTH EARTH WILSON'S THEORY . EARTH see , also , how , as the sun revolving on its axis brings a spot nearer and nearer to the centre , thus giving us a more direct view of the opening ...
... penumbra . We can readily Fig . 13 . DARK nucleus EARTH EARTH WILSON'S THEORY . EARTH see , also , how , as the sun revolving on its axis brings a spot nearer and nearer to the centre , thus giving us a more direct view of the opening ...
Page 64
Joel Dorman Steele. penumbra , which , in its turn , will pass from our sight . The existence of an outer atmosphere will ... penumbra around the spots . Spectrum analysis . - The hypothesis just given of the constitution of the sun rests ...
Joel Dorman Steele. penumbra , which , in its turn , will pass from our sight . The existence of an outer atmosphere will ... penumbra around the spots . Spectrum analysis . - The hypothesis just given of the constitution of the sun rests ...
Page 155
... ( umbra ) of Fig . 48 ន UMBRA AND PENUMBRA . the moon falls on the earth and obscures the entire body of the sun . To the persons within that region there is a total eclipse ; the breadth of this ECLIPSES . 155 ECLIPSES •
... ( umbra ) of Fig . 48 ន UMBRA AND PENUMBRA . the moon falls on the earth and obscures the entire body of the sun . To the persons within that region there is a total eclipse ; the breadth of this ECLIPSES . 155 ECLIPSES •
Page 156
... penumbra ( pene , almost -- umbra , a shadow ) , where only . a portion of the sun's disk is obscured . Within this region there is a partial eclipse . To those persons liv- ing north of the equator and of the umbra , the eclipse passes ...
... penumbra ( pene , almost -- umbra , a shadow ) , where only . a portion of the sun's disk is obscured . Within this region there is a partial eclipse . To those persons liv- ing north of the equator and of the umbra , the eclipse passes ...
Page 162
... penumbra , where the earth cuts off the light of only a portion of the sun . The moon enters the penumbra of the earth at a , -this is termed her first contact with the penumbra ; next she encounters the dark shadow of the earth at b ...
... penumbra , where the earth cuts off the light of only a portion of the sun . The moon enters the penumbra of the earth at a , -this is termed her first contact with the penumbra ; next she encounters the dark shadow of the earth at b ...
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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