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/r/astrophysics

shooting a gun in orbit

92 upvotes • champagne-babyy
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If we were to stop orbiting the sun, how long would it take us to fall into it?

87 upvotes • Etvaht115
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Does an infinitely large universe imply infinite mass?

76 upvotes • _Nirtflipurt_
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How does anything actually reach the singularity in a black hole?

39 upvotes • WeezerHunter
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Is the observable universe as same as entire universe?

38 upvotes • ExternalTranslator62
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Is the universe accelerated expansion slowing down?

37 upvotes • stifenahokinga
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Would it be impossible to watch something fall into a black hole?

28 upvotes • mk2bismarck
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Could life be theoretically possible around a Wolf-Rayet star?

23 upvotes • Gremio_42
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What does getting the log10 of stellar mass give?

17 upvotes • Jayleno2347
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Want to pursue astrophysics(firstly a Physics major) and had a question about minors

11 upvotes • PlaidCypress
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