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

Slideshow Iconslideshows MORE

|

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

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

Top 10 Sweet 16 Birthday Gifts
Your daughter's sweet 16 is a big milestone in her life. Celebrate this special occasion with one of these top gifts for girls turning 16.

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

Printable Lists of the Top 100 Baby Names
Need help with baby name ideas? Use our printable list of the top 100 girl names and top 100 boy names of 2015 to help you brainstorm and narrow down your favorites.

Registered for Kindergarten — Now What?
Wondering what to do now that you've signed your child up 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