Astronomy Stack Exchange by Kiwix

Q&A for astronomers and astrophysicists

Most popular questions

116 How much gold is there in our sun? 2018-01-19T08:19:35.130

111 How loud would the Sun be? 2015-12-15T00:51:33.153

75 Does the Sun rotate? 2013-09-25T15:46:34.720

74 Why is the discovery of merging neutron stars important? 2017-10-16T17:31:12.293

70 Why don't astronomers use meters to measure astronomical distances? 2017-03-20T15:38:30.147

64 Is the moon only 60 pixels? 2014-05-09T15:14:16.523

63 How can there be 1,000 stellar ancestors before our Sun? 2016-06-21T16:38:10.857

61 How does the Earth move in the sky as seen from the Moon? 2014-12-01T19:15:42.050

58 Could the dinosaurs have seen the asteroid that killed them? 2018-01-31T22:58:00.787

56 Why is only one side of the Moon visible from Earth? 2013-09-24T19:31:17.000

55 Does the Milky Way move through space? 2017-09-12T17:51:45.460

51 When will the Sun end all human life on Earth? 2016-08-10T19:26:56.097

50 Where did TRAPPIST-1a go? 2017-02-23T09:19:14.810

49 What would happen if an ice cube is left in space? 2014-05-04T15:01:12.820

47 How many planets are there in this solar system? 2013-10-08T23:43:31.327

47 Why is moon light not the same color as sunlight? 2018-06-27T15:10:42.440

46 Why hasn't the "9th Planet" been detected already? 2016-01-23T01:36:35.630

45 Two species of dark matter? 2013-10-25T15:45:17.243

44 How powerful a telescope would allow me to view the astronauts aboard ISS do a space-walk? 2013-10-16T13:37:49.987

42 How can 'HD 140283' be older than the universe? 2016-12-19T09:33:06.120

41 Why has Venus's atmosphere not been stripped away by solar wind? 2013-10-14T14:30:22.200

41 Why do Black Holes in the middle of galaxies not suck up the whole galaxy? 2017-12-19T15:41:02.040

38 Why does gas form a star instead of a black hole? 2017-06-27T16:59:53.640

38 How old is the oldest light visible from Earth? 2018-04-10T00:40:13.947

36 What is in the center of the universe? 2013-10-16T15:44:06.363

36 Can the moon appear to be in any position in the sky? 2017-03-13T16:41:03.553

35 9th planet location? 2016-01-20T19:54:14.817

35 How do we have photos of galaxies so far away? 2017-09-10T15:53:07.167

35 Why are we building larger land-based telescopes instead of launching larger ones into space? 2018-06-12T11:55:54.397

34 How are black holes found? 2013-09-24T19:46:14.980

33 Where does the Solar System end? 2014-10-04T15:32:43.693

33 Do all stars have an Oort cloud or is it a rare occurence? 2014-10-18T18:10:45.733

33 Why doesn't the moon twinkle? 2016-03-09T09:27:18.143

33 Is it possible to achieve a stable "lunarstationary" orbit around the moon? 2017-03-22T12:21:39.960

33 Considering our methods of exploration, how likely is it that there are unfound planets (not dwarf planets) in our solar system? 2018-10-31T03:02:17.583

32 How does neutron star collapse into black hole? 2013-10-23T09:19:16.200

32 What did LIGO Actually See? (Gravitational waves discovery) 2016-02-16T15:19:15.370

32 What happens to the 99.9 % of the sun-rays that do not fall on any planets or any other celestial body? 2016-08-20T14:28:05.863

32 How large can a ball of water be without fusion starting? 2017-03-18T16:47:41.910

31 How do I calculate the inclination of an object with an amateur telescope? 2013-09-24T18:51:54.593

31 Can our Sun become a black hole 2015-01-05T09:04:41.973

31 Did I see another planet? 2016-03-27T13:27:32.133

31 If you lived on the far side of the Moon, how could you infer the existence of Earth? 2017-08-29T11:54:50.547

30 Why does Jupiter have so many moons? 2013-09-27T14:01:12.247

30 Why is our solar system "tipped" about 63° with respect to the plane of our galaxy? 2013-10-09T01:12:39.320

30 How can we tell that the Milky Way is a spiral galaxy? 2013-12-21T10:23:56.430

30 Why is the Sun's density less than the inner planets? 2016-05-16T15:02:43.743

29 How could a hobbyist astronomer determine apparent magnitude of a star? 2013-09-27T18:08:36.317

29 Can small gas planets exist? 2013-09-29T00:51:20.507

29 What's the fastest moving object in the universe? 2013-11-07T18:29:42.743

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