Printer Friendly

How do moons comes into existence?

[ILLUSTRATION OMITTED]

Moons form in one of three ways, says Mark Sykes, director of the Planetary Sciences Institute in Arizona.

The oldest moons were born alongside the planets. Bits of gas and dust that didn't join to form the planets gathered on their own. Gravity, or a force that pulls objects together, attracted more and more material to these bunches and they became moons.

Some moons, like Mars's, were once asteroids or similar objects flying by. They were captured by the planet's gravitational pull and began orbiting around it. Earth's moon started with a dramatic twist. Something Mars-size hit Earth and pieces of the planet splashed into space. These fragments formed a ring around Earth and eventually clumped together into our moon.

Question from Max R., E-mail submission

COPYRIGHT 2009 Scholastic, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2009 Gale, Cengage Learning. All rights reserved.

 Reader Opinion

Title:

Comment:



 

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:YOU CAN DO IT
Author:R., Max
Publication:Science World
Article Type:Brief article
Geographic Code:1USA
Date:Apr 20, 2009
Words:128
Previous Article:Rough waters: one of the world's most turbulent rivers is home to a wide array of fish species. Now, large dams are threatening their future.
Next Article:Explain this!
Topics:

Terms of use | Copyright © 2014 Farlex, Inc. | Feedback | For webmasters