I don't know, maybe google a few things? The most obvious search terms for me, turned up the pre-existence of the legitimate astronomy app, not to mention the trademarked name collision with a horror video game.

https://news.ycombinator.com/item?id=49217212

Perhaps engage critical thinking? Apply the CRAAP Test? Seek some independent confirmation of facts, rather than just being a mouthpiece for some hysterical acquaintance? If I had a Bitcoin for every time I heard some gamer was "banned for no reason!!1"

Apple could've denied the app just for clashing with the name of an existing game... a game that involved demons tossing fortune-telling cards around