Elementary Lessons in Astronomy |
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Page 45
... inclination of the Sun's axis is exaggerated , so that the effect it produces may be more clearly seen . in June , they go straight across the sun's face or disc with a dip downwards ; if in September , they then cross in a curve ...
... inclination of the Sun's axis is exaggerated , so that the effect it produces may be more clearly seen . in June , they go straight across the sun's face or disc with a dip downwards ; if in September , they then cross in a curve ...
Page 65
... inclination to it ; and that the orbits of the comets are inclined to it in all directions . The straight line we suppose to represent the Earth's orbit looked at edgeways , as we can look at a hoop edgeways . The others represent the ...
... inclination to it ; and that the orbits of the comets are inclined to it in all directions . The straight line we suppose to represent the Earth's orbit looked at edgeways , as we can look at a hoop edgeways . The others represent the ...
Page 76
... inclined in the same manner , but to a much greater extent . The direction of the inclination , as in the case of the Sun , is , roughly speaking , always the same . 169. We have then two completely distinct motions- one round the axis ...
... inclined in the same manner , but to a much greater extent . The direction of the inclination , as in the case of the Sun , is , roughly speaking , always the same . 169. We have then two completely distinct motions- one round the axis ...
Page 77
... inclined the direction of the dip being such that on the 21st of June the axis is directed towards the Sun , the inclination being 23. Now , if we bear in mind that the Earth is spinning round once in twenty - four hours , we shall ...
... inclined the direction of the dip being such that on the 21st of June the axis is directed towards the Sun , the inclination being 23. Now , if we bear in mind that the Earth is spinning round once in twenty - four hours , we shall ...
Page 78
... inclination of the axis , until , when we arrive at the solstice , in spite of the Earth's rotation , we cannot get out of the light . At this time we see the midnight sun due north ! The Sun , in fact , does not set . The solstice ...
... inclination of the axis , until , when we arrive at the solstice , in spite of the Earth's rotation , we cannot get out of the light . At this time we see the midnight sun due north ! The Sun , in fact , does not set . The solstice ...
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Common terms and phrases
angle aphelion appear Assistant Master astronomers atmosphere attraction axis Boötes called Cambridge celestial equator celestial pole celestial sphere centre circle clock College comet constellation determined diameter direction Earth Earth's rotation Earth's surface ecliptic ELEMENTARY equal equatorial equinox exactly eye-piece fact Fcap follows globe GREEK Greenwich heavenly bodies heavens horizon Illustrated inclined Jupiter latitude length lens LESSON light longitude Mars mass measured meridian meteorites meteors miles Moon Moon's motion nearly nebulæ Neptune node object-glass observed occupied orbit parallax path penumbra perihelion planet point of Aries polar pole portion position prism Prof Professor rays refraction represent revolution revolve round right ascension ring round the Sun satellites Saturn seen shadow side sidereal solar day solstice spectrum spots stars Sun's suppose telescope tion transit travel round triangle true sun Uranus Ursa Ursa Major vapour velocity Venus vernal equinox visible
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