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Originally posted by Off_The_Street
Of course we have figured out what "outer space" is made of; we have travelled through it and sent out unmanned ships there, too.
Outer space is almost nothing; just as close to a pure vacuum as you can get out side the laboratory -- with maybe a microgram of gas (usually hydrogen) per cubic meter of otherwise nothing.
Originally posted by Galvatron
Black holes don't necessarily have infinte matter.