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solar system

Solar System
Image: NASA JPL

Solar System

Formed 4.6 billion years ago, the solar system consists of 8 planets, more than 40 dwarf planets, about 170 known moons, asteroids, comets, and other celestial objects — all orbiting the mighty Sun.

Scientists are making new discoveries about our galactic neighborhood, located in the Orion arm of the Milky Way galaxy, all the time. Take a look.

Science Channel
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‘8 Planets and a Dwarf’ Sudoku

‘8 Planets and a Dwarf’ Sudoku

Love puzzles? This online Sudoku-like puzzle involves all the planets of the solar system, plus Pluto. Featuring 5 levels, you can start with “very easy” and work your way up to “extra challenging.” More...

Game
Windows to the Universe
Explore the Solar System

Explore the Solar System

Play "mission" games and visit the planets, moons, asteroids, and comets in our solar system to get quick facts about each one. More...

Game
NASA
100,000 Stars: A Tour of Our Galaxy

100,000 Stars: A Tour of Our Galaxy

With roughly 200 billion stars, there's a lot to see in our Milky Way galaxy. This interactive lets you zoom in and out and get details about each star. Be sure to take the tour! More...

Interactive
Google, NASA, ESA
Planet Families: Build a Solar System

Planet Families: Build a Solar System

This game models the gravitational attraction of stars and planets, allowing you to see how different solar systems might behave. Try to build one that's stable! More...

Game
aliensearth.org
Planets

Planets

To be a planet, an object must orbit a star and have a spherical shape. Learn more about the 8 major planets and 5 dwarf planets of our solar system. More...

Article
Windows to the Universe
8 of the Most Extreme Places in the Solar System

8 of the Most Extreme Places in the Solar System

Want to see a Martian dust devil or a volcano as wide as Arizona? Check out this gallery featuring extreme wonders of the solar system. More...

Images
Scientific American
How Kepler Discovers Planets

How Kepler Discovers Planets

Scientists seek out undiscovered planets outside our solar system with help from the Kepler spacecraft. This interactive animation explains how Kepler can detect Earth-sized planets that can support life. More...

Interactive
NASA
Inside the Solar System

Inside the Solar System

It would take more than 1,000 Earths to fill Jupiter. Venture inside a solar storm, consider the possibility of life on Mars, and discover a wealth of facts about the solar system by watching these videos. More...

Video
NeoK12.com
Our Solar System: A Photo Tour of the Planets

Our Solar System: A Photo Tour of the Planets

With 31 photos, this cosmic tour highlights the planets and other unique aspects of the solar system, including the Kuiper Belt, the heliosphere, and Haumea. More...

Images
Space.com
Send in the Clouds

Send in the Clouds

Without clouds, we might not exist. NASA scientists have been studying clouds all over the solar system so as to understand them better on Earth. More...

Article
NASA
Solar System Exploration: Alyssa Gilbert

Solar System Exploration: Alyssa Gilbert

Meet Alyssa Gilbert, a scientist and outreach coordinator at the Centre for Planetary Science and Exploration. Find out who inspired her to study astronomy and why she loves her job. More...

Profile
NASA
Solar System Exploration: Planets

Solar System Exploration: Planets

If the Sun were as tall as a door, Earth would be the size of a nickel and Jupiter would be about as big as a basketball. Learn more fascinating facts about our solar system and get the latest space news from NASA. More...

Article
NASA
Solar System: Our Cosmic Neighborhood

Solar System: Our Cosmic Neighborhood

Our solar system is more than just 8 planets orbiting the Sun. Learn about all the heavenly bodies, including moons, asteroids, comets, and space junk. And find out why Earth became a haven for life. More...

Interactive
National Geographic
Space Sense

Space Sense

How much do you know about the 8 planets, stars, and astronauts? Test your knowledge with this fun quiz. With each correct answer, your rocket gets closer to zooming out of the atmosphere. More...

Interactive
Windows to the Universe

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