Home > School and Learning > By Subject > Science and Health > Astronomy > Moons of the Solar System
|

Moons of the Solar System

2 of 10
phobosmars

Phobos


Orbiting Mars are two moons, Phobos and Deimos. This is a picture of the largest of the two moons, Phobos, which comes from the Greek word for fear. Phobos is only 17 miles across, and its orbit around Mars is only 8 hours long, zipping across the sky from the western horizon to the eastern horizon.

Fun Fact: Phobos is doomed. In 100 million years Phobos will either crash into Mars or break up as it's dragged down by the planet's gravity. The current distance between Phobos and the surface of Mars is about 3,600 miles, compared to 250,000 miles between the surface of the Earth and its Moon.

Photo source: NASA

Next: Callisto

View our slideshow gallery

Infoplease

Provided by Infoplease—an authoritative, comprehensive reference website that offers an encyclopedia, a dictionary, an atlas, and several almanacs. Visit Infoplease.com to find more resources endorsed by teachers and librarians.

highlights

6 Sweet Gestures for Teacher Appreciation Week
Show your child's teacher how much she is loved with one of these meaningful homemade gestures for Teacher Appreciation Week (May 2-6)!

Find Today's Newest & Best Children's Books
Looking for newly released books for your child? Try our Book Finder tool to search for new books by age, type, and theme!

8 Epic Emoji-Themed Crafts, Activities & Recipes
Check out the best emoji crafts, activities, and recipes! They're perfect for Screen-Free Week (May 2-8) or an emoji-themed birthday party.

Ready for Kindergarten?
Try our award-winning Kindergarten Readiness app! This easy-to-use checklist comes with games and activities to help your child build essential skills for kindergarten. Download the Kindergarten Readiness app today!

stay connected

Sign up for our free email newsletters and receive the latest advice and information on all things parenting.

Enter your email address to sign up or manage your account.

Facebook icon Facebook icon Follow Us on Pinterest

editor’s picks