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blademan9999
  • Member for 3 years, 11 months
  • Last seen more than a week ago
28 votes
2 answers
4k views

Wouldn't Miller's planet be fried by blueshifted radiation?

22 votes
1 answer
3k views

Why are there no known white dwarfs between 1.35 to 1.44 solar masses?

18 votes
3 answers
2k views

How close does a photon have to get to a black hole to do a full loop?

11 votes
2 answers
2k views

How close to a black hole can an object orbit elliptically?

10 votes
5 answers
3k views

Why has it been so hard to come up with testable predictions for string theory? [closed]

8 votes
2 answers
1k views

Hayward black hole

8 votes
2 answers
797 views

How "wide" are absorption and emission lines?

7 votes
2 answers
184 views

Why are black holes sometimes formed without supernovae?

7 votes
1 answer
167 views

How small would a neutron star be to see the entirety of it?

7 votes
2 answers
2k views

Why is the Sun’s emission spectrum shaped like this?

6 votes
2 answers
226 views

Dropping a mirror into a blackhole

6 votes
0 answers
410 views

What are domain walls?

5 votes
1 answer
48 views

How big can a sphere of water in low earth orbit get?

5 votes
0 answers
70 views

Why are there fewer brown dwarfs than stars?

5 votes
1 answer
262 views

Could someone explain this phase diagram to me?

4 votes
1 answer
181 views

Why is the least massive neutron star less massive than the most massive white dwarf?

4 votes
1 answer
214 views

How fast would a clock falling into a blackhole tick relative to the reflection of a clock stationed far away?

3 votes
1 answer
140 views

With how much energy can a charged black hole launch a electron away with?

3 votes
2 answers
365 views

How strong of a gravitational field do you need for a projectile to make a full loop?

3 votes
1 answer
202 views

Where does the parallel universe in the Penrose diagram come from?

3 votes
0 answers
54 views

How does the lifetime and temperature of a black hole scale with mass in higher dimenstions?

2 votes
1 answer
64 views

Neutrinos from a Type 1a Supernova

2 votes
0 answers
112 views

How is the Neutron capture cross section of Xenon-135 so high?

2 votes
0 answers
85 views

A question about Kerr black holes and Hawking radiation

2 votes
1 answer
55 views

How close would a evaporating primodial black hole be to be detected? [closed]

2 votes
1 answer
103 views

Why is UV radiation below 200nm strongly absorbed by Oxygen?

2 votes
1 answer
65 views

How large would the earth have to be to retain hydrogen?

2 votes
1 answer
234 views

How does adding heat cause helium-3 to freeze? [duplicate]

2 votes
1 answer
319 views

What does the Penrose diagram of a super extremal black hole (naked singularity) looks like?

2 votes
2 answers
121 views

What percentage of sunlight isn't scattered by the atmosphere?