Yeah (unfortunately) but there are lots of open source space simulation programs: https://news.ycombinator.com/item?id=20518109 https://news.ycombinator.com/ite

Yeah (unfortunately) but there are lots of open source space simulation programs: https://news.ycombinator.com/item?id=20518109 https://news.ycombinator.com/item?id=20518109