TABLE OF USEFUL ASTRONOMICAL FACTS.

The sun’s mean distance from the earth is 92,700,000 miles; his

diameter is 865,000 miles, and he rotates in a period between 25 and 26

days.

The moon’s mean distance from the earth is 238,000 miles; the diameter

of the moon is 2160 miles, and the time of revolution round the earth

is 27.322 days.

Star-land: Being Talks With Young People About the Wonders of the Heavens · 第 113 / 146 题