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Why aren’t the stars visible in pictures of astronauts on spacewalks?
Answeredadmin asked 2 years ago • 
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how-far-is-andromeda-galaxy
Answeredram asked 2 years ago • 
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how-do-black-holes-work
AnsweredVedh asked 2 years ago • 
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Do you think that people who don't understand relativity are limiting their understanding of the universe?
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how old is the universe ?
Answeredadmin asked 3 years ago • 
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