Here’s an interesting little program I stumbled across that will definitly catch your eye if you like astronomy. You can explore the solar systems, planets, moons, comets, asteroids, and even go far beyond that exploring far away stars, galaxys and planets. On a side note, messing around with this for a while before going to sleep might lead to some interesting space dreams 
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You can find it at https://www.shatters.net/celestia/
Don’t forget to check out the addons where you can add extra moons, manmade sattelites, etc. to the program.
