Answer 1:
The earth has an atmosphere that is about 60
miles thick ... Beyond that , we call the next
environment space.
There is interplanetary space,
interstellar space, intergalactic space. As
far as anyone knows, it seems like it goes on...
at least for 1026 meters. That is
1,000,000,000,000,000,000,000,000,000 meters.
A meter is about a yard. Your question is the
subject matter of cosmology. Many people
from the first stone age peoples to today
have asked this question. No one really knows the
answer, but we can distinguish between the very
thin part of the Earth's upper atmosphere and true
space.
I hope this helps.
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