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Marc's user avatar
Marc's user avatar
Marc's user avatar
Marc
  • Member for 10 years, 6 months
  • Last seen more than 5 years ago
  • San Diego, CA
6 votes
Accepted

Why is liquid water considered a requirement for life?

6 votes
Accepted

Do solar systems have to evolve in a galaxy?

5 votes

Is it possible to be 'still' in space?

5 votes
Accepted

How is the magnitude of a star measured?

5 votes

How did Kepler determine the orbital period of Mars?

4 votes

What is the formula to figure out how far away a star is?

3 votes

If NASA is going to capture an asteroid with a spacecraft, wouldn't a UFO be able to manuever a celestial body?

3 votes

Why does time get slow near a black hole?

2 votes

Why don't we feel the speed of earth moving

2 votes

Why can you see the space station on some days but not on others?

2 votes

What happened before the big bang?

1 vote

Why are planets spherical?

1 vote

Why do objects burn when they enter earth's atmosphere?

1 vote

Would it be possible to calculate the expected frequency of impact craters of all sizes on Earth

1 vote

Which is really larger, Big Dipper or Small Dipper, in 3D

0 votes

Radioactive decay is the main source of the earth's interior heat: fact or theory?