User James K

79 votes

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

answered Jan 30, 2021 at 10:46

71 votes

Are photons aged?

answered Feb 23, 2020 at 18:34

67 votes

Why did it take so long to invent telescopes given glass was used 4000 years ago in Mesopotamia?

answered May 27 at 8:51

65 votes

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Shouldn't very very distant objects appear magnified?

answered Aug 19 at 6:39

63 votes

Why is Starlink polluting the night sky a big concern if we have space telescopes?

answered Apr 19, 2021 at 20:37

61 votes

Do our sun and moon have names?

answered Nov 30, 2020 at 12:44

60 votes

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Why isn't the asteroid belt affected by Jupiter's gravitational field?

answered Feb 9, 2020 at 15:15

59 votes

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Will there be collision between universes?

answered Oct 2, 2021 at 23:11

58 votes

How can comets have tails if there's no air resistance in space?

answered Apr 23, 2020 at 19:47

57 votes

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How did Eratosthenes know that the sun is far away?

answered Sep 14, 2020 at 18:35

56 votes

Is the Big Bang a theory or a model?

answered May 14 at 17:32

54 votes

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How do scientists know that the distant parts of the universe obey the physical laws exactly as we observe around us?

answered Sep 27, 2020 at 11:50

52 votes

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

answered Sep 25, 2020 at 17:07

51 votes

Why is the solstice the first day of summer, and not the central day?

answered Feb 5 at 0:19

50 votes

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Why is there a gap in this image of supernova discoveries?

answered Jun 4, 2016 at 18:32

48 votes

How did the Milky Way quasar not disrupt life on Earth?

answered Oct 8, 2022 at 10:25

47 votes

If all stars rotate, why was there a theory developed that requires non-rotating stars?

answered Aug 21, 2019 at 12:19

46 votes

What keeps galaxies together?

answered Feb 28, 2021 at 20:07

45 votes

Why, since Earth is in free fall towards Sun, are tides affected by Sun's gravity? Why aren't the oceans "weightless" like astronauts?

answered Oct 2, 2022 at 13:21

45 votes

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When stars explode after running out of fuel, why are new stars born from the remnants?

answered Aug 13, 2022 at 11:34

45 votes

Is it possible for a lunar eclipse to occur before sunset

answered Jan 2 at 18:05

44 votes

How can a mirror see things that the naked eye can’t?

answered Feb 22, 2020 at 10:48

44 votes

Why is the discovery of merging neutron stars important?

answered Oct 16, 2017 at 18:06

44 votes

Why is there a mountain inside the Herschel crater on Mimas?

answered Jul 4, 2021 at 6:58

44 votes

Is the Astronomical Unit measured from the Sun's center or from the surface?

answered Sep 1, 2021 at 11:11

44 votes

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Does the Earth constantly lose mass?

answered Mar 8 at 6:38

43 votes

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Closest star system to Alpha Centauri?

answered May 17, 2020 at 22:25

43 votes

Why is Uranus called a "green planet"?

answered Sep 17 at 6:43

42 votes

Why do things float in space, though the gravity of our star is always present?

answered Jun 15, 2019 at 19:26

42 votes

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Intuition about why gravity is inversely proportional to exactly square of distance between objects

answered Nov 4, 2020 at 21:38

Stack Exchange Network

1,611 Answers

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

Are photons aged?

Why did it take so long to invent telescopes given glass was used 4000 years ago in Mesopotamia?

Shouldn't very very distant objects appear magnified?

Why is Starlink polluting the night sky a big concern if we have space telescopes?

Do our sun and moon have names?

Why isn't the asteroid belt affected by Jupiter's gravitational field?

Will there be collision between universes?

How can comets have tails if there's no air resistance in space?

How did Eratosthenes know that the sun is far away?

Is the Big Bang a theory or a model?

How do scientists know that the distant parts of the universe obey the physical laws exactly as we observe around us?

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

Why is the solstice the first day of summer, and not the central day?

Why is there a gap in this image of supernova discoveries?

How did the Milky Way quasar not disrupt life on Earth?

If all stars rotate, why was there a theory developed that requires non-rotating stars?

What keeps galaxies together?

Why, since Earth is in free fall towards Sun, are tides affected by Sun's gravity? Why aren't the oceans "weightless" like astronauts?

When stars explode after running out of fuel, why are new stars born from the remnants?

Is it possible for a lunar eclipse to occur before sunset

How can a mirror see things that the naked eye can’t?

Why is the discovery of merging neutron stars important?

Why is there a mountain inside the Herschel crater on Mimas?

Is the Astronomical Unit measured from the Sun's center or from the surface?

Does the Earth constantly lose mass?

Closest star system to Alpha Centauri?

Why is Uranus called a "green planet"?

Why do things float in space, though the gravity of our star is always present?

Intuition about why gravity is inversely proportional to exactly square of distance between objects