Elements of astronomy ... with explanatory notes, and questions for examination (1855)
Brocklesby, John, 1811-1889 · New York, Farmer, Brace & co. · leaf 223
erefore of the utmost importance in as-tronomical researches. What is the mass of Venus 1 What her density ? What appearances have led astrono-mers to suspect that this planet is possessed of an atmosphere 1 What is said in regard tothe transits of Venus ? TRANSIT OF VENUS. 215 conduct to the… … sit takes place, HVI a portion of the orbit of Yenus,and FG, a diameter of the earth perpendicular to theecliptic. If at the time of the transit two spectatorswere respectively placed at A and B, the diameter ofthe earth apart, the observer at F would see Yenusin the direction FY, projected as a…
Astronomy
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