| Share
 

Earth

Origin of Earth

Earth Today

Continental Drift

Earth's Atmosphere

The Seasons


Earth

Earth, circling the Sun at an average distance of 93 million miles, is the fifth-largest planet and the third from the Sun. It orbits the Sun at a speed of 67,000 mph, making one revolution in 365 days, 5 hours, 48 minutes, and 45.51 seconds. Earth completes one rotation on its axis every 23 hours, 56 minutes, and 4.09 seconds. Actually a bit pear-shaped rather than a true sphere, Earth has a diameter of 7,927 mi at the equator and a few miles less at the poles. It has an estimated mass of about 6.6 sextillion tons, with an average density of 5.52 grams per cubic centimeter. Earth's surface area encompasses 196,949,970 sq mi of which about three-fourths is water.


Information Please® Database, © 2007 Pearson Education, Inc. All rights reserved.

VenusThe Solar SystemMars

More on Earth from Infoplease:


Premium Partner Content
HighBeam Research
Documents Images and Maps Reference
(from Newspapers, Magazines, Journals, Newswires, Transcripts and Books)

Research our extensive archive of more than 80 million articles from 6,500 publications.

Additional search results provided by HighBeam Research, LLC. © Copyright 2005. All rights reserved.

24 X 7

Private Tutor

Click Here for Details
24 x 7 Tutor Availability
Unlimited Online Tutoring
1-on-1 Tutoring