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user1062760
  • Member for 8 years, 7 months
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15 votes
2 answers
2k views

What is the farthest planetary body or star system object we have observed using visual light?

6 votes
2 answers
2k views

Earthing, neutral and Earth's conductivity

5 votes
3 answers
562 views

If Hawking radiation is true why isn't the entire universe glowing?

4 votes
1 answer
76 views

Are there enough charged particles in space to power an ion drive without carrying your own particles?

4 votes
4 answers
2k views

How are orbits made stable?

4 votes
1 answer
495 views

How far has Earth moved from its birth orbit?

3 votes
0 answers
55 views

Do relativistic frames imply different realities? [duplicate]

3 votes
1 answer
646 views

Is moon in perfect tidal lock with earth?

3 votes
0 answers
72 views

How can non-infinitesimal Black holes form in finite time for a distant observer? [duplicate]

2 votes
4 answers
210 views

Why is acceleration of expansion of space unexplained?

2 votes
1 answer
2k views

Explain firewall paradox for blackholes in layman terms

2 votes
2 answers
200 views

Gravity and spacetime bending [duplicate]

2 votes
2 answers
2k views

Why isn't spent nuclear fuel used as a heat source? [closed]

1 vote
1 answer
59 views

Does matter stacks up as it approaches Black hole?

1 vote
2 answers
1k views

Why doesn't sunlight flicker like candle or flame torch?

1 vote
1 answer
81 views

What causes force on a body in gravitationally curved space time? [duplicate]

1 vote
0 answers
28 views

Can one observe a blackhole grow from outside its event horizon? [duplicate]

1 vote
1 answer
275 views

Ways to make a star go supernova? [closed]

1 vote
1 answer
223 views

what is the reason for probability in half life decay of radioactive elements from a physical prespective?

0 votes
1 answer
1k views

Conservation of energy in a powered rocket landing?

0 votes
1 answer
239 views

For a distant observer can a black hole form and grow in finite time? [duplicate]

0 votes
2 answers
101 views

How does relativity holds for universal speed limit? [duplicate]

0 votes
2 answers
161 views

Does anything with non-zero rest mass and speed $c$ exist in the known universe? [duplicate]

0 votes
1 answer
681 views

Does infalling matter ever cross the event horizon? [duplicate]

0 votes
0 answers
79 views

How does time stoppage inside a blackhole affect physics? [duplicate]

-1 votes
3 answers
108 views

Are there any known non-zero mass objects travelling at almost $c$ observed in the universe so far?

-3 votes
1 answer
3k views

Why were rubber o rings used on challenger shuttle boosters? [closed]