An abridgment of Smith's Illustrated astronomy (1850)
Smith, Asa · New York, Cady & Burgess · leaf 45
ly setting to places inthe east. Q. In what time does the earth revolve around the sun, orperform its annual revolution ? ^ A. In 365 days 6 hours. Q. How fast does it move in its orbit around the sun ? A. 68,000 miles an hour. Q. How are the changes of the seasons caused ? A. They are caused by… … ILLUSTRATED ASTRONOMY. 33 Q. Is the direction of the earths axis changed during theyear? A. Its change is so slight that it may be consi-dered as pointing to the same place in theheavens. Q. When does the north pole lean directly towards the sun ? A. On the 21st of June, called the summer…
Astronomy, Juvenile and popular
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
