UCSB Science Line
Sponge Spicules Nerve Cells Galaxy Abalone Shell Nickel Succinate X-ray Lens Lupine
UCSB Science Line
Home
How it Works
Ask a Question
Search Topics
Webcasts
Our Scientists
Science Links
Contact Information
How the earth spins on its axis and keeps a steady orbit around the sun?
Answer 1:

Because there aren't many atoms in space, there's not much to stop things from moving. For this reason, the Earth keeps on spinning and doesn't get much slower. (In truth, it's actually slowing a little because it's exchanging energy with the moon, which is why we have tides.) For the same reason, gravity from the sun is attracting the Earth towards the sun, and the Earth is moving quickly, so it causes it to orbit. Because there is nothing to apply an external force on the Earth and change its momentum, it continues in its stable orbit.



Click Here to return to the search form.

University of California, Santa Barbara Materials Research Laboratory National Science Foundation
This program is co-sponsored by the National Science Foundation and UCSB School-University Partnerships
Copyright © 2015 The Regents of the University of California,
All Rights Reserved.
UCSB Terms of Use