QUESTIONS AND ANSWERS.
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ONE HUNDRED QUESTIONS AND ANSWERS ON “RECREATIONS
IN ASTRONOMY,” FROM CHAPTER VIII TO END OF BOOK.
By ALBERT M. MARTIN, General Secretary C. L. S. C.
1. Q. How many primary planets have been discovered between the sun and the earth? A. Six; four planetoids, Mercury and Venus.
2. Q. When and by whom were the four planetoids discovered? A. In 1878, during a total eclipse of the sun, Prof. Watson, of Ann Arbor, Mich., and Lewis Swift, the famous comet-finder, each discovered two small bodies within the orbit of Mercury.
3. Q. What is the distance of these planetoids from the sun? A. About thirteen million miles.
4. Q. What is the time of their orbital revolution? A. About twenty days.
5. Q. What is the mean distance of Mercury from the sun? A. Thirty-five million miles, in round numbers.
6. Q. What is the diameter of Mercury in round numbers? A. Three thousand miles.