Based off of this post. Ignore the mod i uploaded a month ago, it crashes your game.

This mod adds an all new room called the planetarium. It has a spacey background and music (Breath in the light by Stellardrone). It has it's own item pool of space related items and 1 new item, Astro Baby. It also adds a couple other rooms, like fallen angels in devil rooms and shops in secret rooms.

If you have any suggestion for a different song or a different mod, feel free to post them in the comments.

I found a seed thank to Index154! Now there are screenshots!