Some genuine questions for flat earthers

These aren't criticism, these are genuine questions about the flat earth model.

1: are there planets/celestial bodies outside of earth? If so, what shape are they?

2: what is the firmament dome made of?

3: how does the moon shine?

Also, I just want to thank you guys for being a lot nicer than other flat earth subreddits. The other ones I've seen will ban you for "worshipping heliocentric indoctrination and propaganda" of you dare to bring up an opposing argument.