Aliens, E.T., extra terrestrials. There are many names.
There is every known element floating around in outer space, since that is where most of the elements on Earth originally came from. When a star that is 25 times the size of our own sun goes supernova, it explodes and sends out most of it's mass (24 solar masses) into outer space.
No they can not operate in outer space.
Yes, gold is from outer space
That depends on what you mean by "outer space". The moon is outside the Earth's atmosphere and therfore "in space" but it is orbiting the Earth and therfore hardly "outer".
Astronomy
Nothing. That is why they call it outer space. the only things that are out there are stars, rocks, planets and light and darkness
Astronomy is all about the things in outer space and planets are in outer space.
"Outer space" is fine. The word "Universe" is a similar concept.
Exospace or "E" Space as its communally referred to is the space outside of normal space or as we call Outer Space in the known Universe
Astronomers
In theory, it can't. Astronomers consider time and space to be different sides of the same function - they call it "timespace". As long as time continues, space will continue to expand.
Mainly astronomers. But cosmologists and astrophysicists will also be interested in outer space.
None, they're all on the earth.
Strategic Defense Initiative.
outer (as in "outer space")
If by mechanics you mean laws of physics, and if you mean outer space as being in outer space far away from gravitational pull, all laws apply aside from gravitational laws.