Question

How do we know there are other planets out there? Is there any proof?

Answer 1

yes, the proof is that astronaut have seen those planets and even with the help of telescope we can also see them ourself

Answer 2

If we find lots of planets like ours…we’ll know it’s likely that we aren’t alone, and that someday we might be able to join other intelligent life in the universe.”

please make me brainlist