Drag and drop planets and stars to make your own solar system. The physics engine will calculate how gravity between all of the asteroids, planets, and stars affect one another while they move through space.

Can you make a stable solar system? How about a stable solar system with a binary star?

What’s New

Version 1.1.01

- bug fixes with star collisions and comet tails

Ratings and Reviews

3.6 out of 5
9 Ratings
9 Ratings
Lol I'm anonymous ,

Updated!!!!! So happy!!

I love this app and was introduced to it through the "Space" section in the nature and science museum here in Colorado. I am a 14 year old science freak and almost started a line to play Planet Families in the museum. I love this app and everything about it and it would be a great way to teach a class. I see that you have updated the game like so and I am so excited!!! Thank you so much!!

gametion galaxy ,

Star movement

The star moves so fast when I put a star in a huge star and when it stops I can’t put rocks 😕

Biddy po ,

I expected more

This app is really great for understanding how gravity works, you can even add Suns to influence the pull of gravity, which I liked. But that's really all it does. I expected to be able to explore each planet and understand how their distance from the sun affected the length of their days, years, and how it influenced the planet's gravitational pull. I became bored very quickly, but it wasn't a terrible app.


Space Science Institute
32.5 MB
Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Czech, Dutch, French, German, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese, Turkish
Age Rating
Rated 4+
© 2014 Space Science Institute


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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