An abridgment of Smith's Illustrated astronomy (1850)
Smith, Asa · New York, Cady & Burgess · leaf 29
occasions these openings in the luminous atmos-phere ? A. They have been attributed to storms andvarious other causes. Q. Do these spots undergo any changes ? A. They are constantly changing, and some-times very rapidly. Some have appeared, othersdisappeared suddenly. Q. On what part of the sun do… … ILLUSTRATED ASTRONOMY. 19 LESSON XI. ECLIPTIC AND ZODIAC. Question. What is the ecliptic J . Answer. It is the plane of the earths orbit,extended to the heavens, and intersects the equi-noctial at an angle of 23i degrees, (23° 28) [Note.—It is the apparent path of the sun around the heavens once a…
Astronomy, Juvenile and popular
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