Prove that you are not an AI troll. Prove that space does not exist. Or you can believe the vast amount of evidence provided by those who have been into space. Or you can doubt everything. Maybe this is all my dream and when I wake up, you will not exist. Alternatively, you could use some (un)common sense.
God does not "prove" that He exists. His creation is enough evidence. Likewise, there is enough evidence for space and the globe earth. Evidence is not enough for atheists and FE people. That's their choice.