Space is the boundless three-dimensional extent and is considered to be bigger than anything we can imagine.Reading this statement a question struck me
1.Do all heavenly bodies exist on the same plane?
2.what really is the sky limit...that is how much vertical motion we can do,can there be any limit?
3.how does space expansion occur?(i think this question is related to second question)
(These questions may seem childish but questions are questions.)