Astronomy Explained Upon Sir Isaac Newton's Principles: And Made Easy to Those who Have Not Studied Mathematics : to which are Added, a Plain Method of Finding the Distances of All the Planets from the Sun, by the Transit of Venus Over the Sun's Disc, in the Year 1761 : an Account of Mr. Horrox's Observation of the Transit of Venus in the Year 1639 : And, of the Distances of All the Planets from the Sun, as Deduced from Observations of the Transit in the Year 1761 |
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Page 49
... minutes , from any equinox or sol- stice to the same again ; but from any fixed star to the same again , as seen from the Sun , in 365 days 6 hours and 9 minutes : the former being the length Its diurnal of the tropical year , and the ...
... minutes , from any equinox or sol- stice to the same again ; but from any fixed star to the same again , as seen from the Sun , in 365 days 6 hours and 9 minutes : the former being the length Its diurnal of the tropical year , and the ...
Page 51
... minutes ; and round the Sun with it every year . The Moon's diameter is 2180 miles ; and her distance from the Earth's centre 240 thousand . She goes round her orbit in 27 days 7 hours 43 minutes , moving about 2290 miles every hour ...
... minutes ; and round the Sun with it every year . The Moon's diameter is 2180 miles ; and her distance from the Earth's centre 240 thousand . She goes round her orbit in 27 days 7 hours 43 minutes , moving about 2290 miles every hour ...
Page 56
... minutes longer than with us . His diameter is 4444 miles ; and by his diurnal ro- tation , the inhabitants about his equator are carried 556 miles every hour . His quantity of light and heat is equal but to one half of ours ; and the ...
... minutes longer than with us . His diameter is 4444 miles ; and by his diurnal ro- tation , the inhabitants about his equator are carried 556 miles every hour . His quantity of light and heat is equal but to one half of ours ; and the ...
Page 57
... minutes ; so that his year contains 10 thousand ber of days 470 days ; the diurnal velocity of his equatorial parts ... minutes , but of these near the poles 9 hours 56 minutes . See Dr. SMITH's Optics , ยง 1004 , & seq . change of ...
... minutes ; so that his year contains 10 thousand ber of days 470 days ; the diurnal velocity of his equatorial parts ... minutes , but of these near the poles 9 hours 56 minutes . See Dr. SMITH's Optics , ยง 1004 , & seq . change of ...
Page 58
... minutes of our time ; and is 229 thousand miles distant from his centre : the second performs its revolution in 3 days 13 hours and 15 minutes , at 364 thousand miles dis- tance : the third in 7 days 3 hours and 59 minutes , at the ...
... minutes of our time ; and is 229 thousand miles distant from his centre : the second performs its revolution in 3 days 13 hours and 15 minutes , at 364 thousand miles dis- tance : the third in 7 days 3 hours and 59 minutes , at the ...
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Common terms and phrases
angle appears April Aries ascending node beginning of egress body circle Clock conjunction degrees diameter diurnal diurnal motion Dominical letter Earth's axis Earth's centre eclipse equal equator equinoctial equinox fixed stars full Moon globe goes round half heavens horizon horizontal parallax inclined Julian period July June Jupiter latitude Leap-Year London longitude lunar lunation March mean Anomaly mean distance mean new Moon Mercury meridian miles minutes Moon's orbit motion noon north pole observed opposite parallel path penumbra planets plate polar circles revolution right line rising round the Earth round the Sun satellites Saturn seconds seen semidiameter Sept shewn side signs solar south pole subtract Sun and Moon Sun's centre Sun's disc Sun's mean suppose tides tion total ingress transit transit of Venus tropic tropic of Cancer tropic of Capricorn true turns round Venus Venus's