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peterh's user avatar
peterh
  • Member for 8 years, 3 months
  • Last seen more than a week ago
24 votes
Accepted

Is there any orbit at which the Roche limit can be "felt"?

15 votes

Can a system of three stars exist?

15 votes

Is there a star over my head?

11 votes
Accepted

Satellite in orbit in front of and behind the Moon

11 votes

Is there anything like a supermassive white hole? How are they formed? And where are they present?

8 votes
Accepted

Lunar orbit distance

8 votes
Accepted

How well would the Moon protect the Earth from an Asteroid?

8 votes

If the Sun disappeared, could some planets form a new orbital system?

7 votes
Accepted

How much solid matter is in the observable Universe?

6 votes
Accepted

How is dark matter different from ordinary (visible) matter?

6 votes

If the Universe is infinite, why isn't it of infinite density?

5 votes

Could Black holes forge heavier elements that have yet to be discovered?

5 votes

antimatter annihilation in stars

5 votes

Would two Earth-like planets on opposite sides of a Sol-like star at about 1 AU be a stable configuration?

4 votes
Accepted

If the whole observable Universe is as big as planet Earth, how big would Earth be?

4 votes

I need to study space, planets and black holes, how do I study them on my own

4 votes
Accepted

What is the closest candidate for Dark Matter currently?

4 votes
Accepted

How deep in Mars would a person not need insulation and pressure?

4 votes

Why does the moon not leave its orbit around the earth due to the gravitational force from the sun?

3 votes
Accepted

Is there any way to tell which way is the next universe?

3 votes
Accepted

How many light years away is Earth from the closest outer edge of the black hole at the center of the Milky Way?

3 votes

What is the relative time difference between us and a star system in outer layer of our galaxy?

3 votes
Accepted

How loud would a black hole be?

3 votes

Can a black hole be torn apart by SMBHs?

3 votes

If the Higgs field only formed after the Big Bang, how was hydrogen formed?

3 votes

From what distance would our sun have an angular diameter of 7 arc seconds?

3 votes

Small changes to Earth's orbit caused by a large impact on the Moon

3 votes

How can you verify the theories presented on TV shows like "How the Universe Works" is current and/or valid?

3 votes

Is it possible to revive the Mars geodynamo?

3 votes

any proof that stars are born, and die?