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20 votes
4 answers
5k views

What would happen if a small black hole fell into a star?

1 vote
0 answers
81 views

How long could a world like the Moon survive with an Earth mass black hole in the center?

6 votes
1 answer
773 views

Could an hypothetical hidden black hole companion to the sun be revealed by proper motion data?

2 votes
2 answers
430 views

How could lithium burning take place in a quasi-star?

14 votes
4 answers
3k views

Can a small black hole orbit a large star?

2 votes
2 answers
337 views

The consequences and the mechanisms of a shift of the Earth away from the sun

-1 votes
2 answers
165 views

Why do we not call black holes black stars or dark stars?

16 votes
4 answers
9k views

Is there a maximum size for a black hole?

6 votes
2 answers
327 views

Would gravitational waves be subject to external gravitational perturbations?

9 votes
3 answers
3k views

Binaries consisting of a black hole and a non-black hole?

2 votes
3 answers
145 views

How can Kerr black holes have a 'speed limit' to how fast they can spin?

15 votes
7 answers
10k views

How did the Milky Way quasar not disrupt life on Earth?

-3 votes
3 answers
232 views

Can black holes even exist [if mass cannot be retained near the collapse threshold]?

1 vote
1 answer
92 views

Amount of black holes over time

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