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David Hammen
  • Member for 7 years, 9 months
  • Last seen this week
  • Houston, TX
52 votes
Accepted

Is the sun's volume shrinking currently?

47 votes
Accepted

Why is the summer solstice night shorter than the winter solstice day?

41 votes
Accepted

What is the most accurate measurement of the Astronomical Unit?

40 votes

Is it possible that the shadow of The Moon is a single dot during solar eclipse?

36 votes
Accepted

Why is there so little nitrogen in the Martian and Venusian atmospheres?

34 votes
Accepted

How can Io be tidally heated while it is in tidal lock?

32 votes
Accepted

How was the mass of Venus determined?

32 votes
Accepted

Will Earth lose the Moon before the Sun goes into supernova?

31 votes
Accepted

How is it possible that Saturn's gravitational acceleration felt by Mimas is stronger than Mimas' own surface gravity?

31 votes

Is it a coincidence that on the far side of the moon almost no seas are visible?

31 votes
Accepted

Why are asteroids so much richer in precious metals than Earth's crust?

30 votes
Accepted

How many times brighter would full-earth-shine appear to people standing on the moon, than full-moon-shine does to people on earth?

30 votes
Accepted

What will the PRECISE time of the Summer Solstice 2020 be?

30 votes

Why can't our Sun be a binary with Jupiter as a T or Y dwarf?

29 votes
Accepted

Am I miscalculating distance to Moon?

28 votes
Accepted

Why does the Earth have a z-component at the start of the J2000 epoch?

28 votes

Do our sun and moon have names?

28 votes

Why are the time zones calculated as 360°/24 and not 361°/24 or 360°/23.933?

28 votes
Accepted

Is the Earth-Sun distance 1.012 AU?

27 votes

Why do sunspot rise in number "precisely" every eleven years?

25 votes

What do astronomers do different now that they know about fusion of the Sun?

23 votes
Accepted

Why does the Parker Solar Probe slow down as the distance from the Sun increases?

23 votes

Is there any planet/star bigger than VY Canis Majoris?

22 votes
Accepted

Why would the side of the moon that faces earth be as dark as the far side of the moon?

22 votes

Why won't the Sun set for days at N66.2 which is below the arctic circle?

22 votes

Why there are no terrestrial planets with a subsurface ocean?

22 votes
Accepted

How do Lagrange points L2 and L3 form?

22 votes

Why doesn't the sun pull the moon away from earth?

22 votes

How did the Earth come to be in orbit around the sun?

21 votes

The moon has just the right speed not to crash on the Earth or escape into space. What are the odds?

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