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

Slideshow Iconslideshows MORE

|

Moons of the Solar System

9 of 10
tritonneptune

Triton


Neptune's main moon is one of the coldest places in our solar system. It's so cold on Triton that even nitrogen freezes and sits as ice on the surface.

Fun Fact: Triton orbits Neptune in the opposite direction of that planet's rotation. This is called a retrograde orbit. Triton is the only large moon in the solar system with a retrograde orbit around its planet, leading scientists to believe that Triton formed elsewhere and was captured by Neptune's gravity long ago. Photo source: NASA

Next: More popular galleries

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.

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 Twitter icon Follow Us on Pinterest

editor’s picks

highlights

Join BIC on our mission to save handwriting and Fight For Your Write! Writing helps kids become better readers, boosts their confidence and sparks their creativity. Visit BICFightForYourWrite.com to sign our petition to save handwriting!

7 Fun Driveway and Sidewalk Games for Kids
Looking for classic outdoor games kids can play in the driveway or on the sidewalk, just like the good ol' days? From hopscotch to bubble-blowing contests, there's something for all ages!

Kindergarten Readiness App Wins Gold
Our Kindergarten Readiness app won the Gold Award of Excellence in the educational category at the 2014 Communicator Awards. This valuable checklist comes with games and activities to help your child practice the essential skills she needs for kindergarten. Download the Kindergarten Readiness app today!

Best Sun Safety Practices for Babies
Follow these sun safety practices for babies to ensure your little one stays safe on the beach and on sunny days all year long.