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Thanks for the nice feedback everyone. I had some time tonight after work and made an improved version with better selection UI and allows for multiple bodies at once: http://callumprentice.github.io/apps/celestial_bodies/index....

I love it! The fact that you made it for your daughter is even better!

Comparing our sun with Trappist's star is really interesting. Try to compare it with Jupiter. They are almost exactly the same.

Very informative. Nicely done.

Nice done! I didn't know that earth is so small compared to sun.

Really nice work. Bookmarked!