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Dec
9
awarded  Yearling
Nov
23
answered How can we focus radio telescopes on a star when the earth is spinning?
Oct
5
comment What will happen to life on Earth when the Andromeda and Milky Way galaxies collide?
@Walter It is fairly well accepted by the scientific community that the Sun's next phase is red giant, with a diameter well beyond the current Earth's orbit. You can do an internet search for "When will the oceans boil away" and choose which source you find most respectable, ignoring, if you like, the global climate change estimates which move the models up a few million years. An interesting recent paper on this subject is "Distant future of Sun and Earth revisited" at arxiv.org/abs/0801.4031 "...it is clear that Earth will come to leave the HZ already in about a billion years time"
Mar
24
answered Why there is no smoke around the Sun?
Dec
9
awarded  Yearling
Oct
28
awarded  Nice Answer
Oct
22
comment What will happen to life on Earth when the Andromeda and Milky Way galaxies collide?
@KeithThompson It'll be a brownfield site by then, a dead bird hanging around the human race's neck. Might as well let the star ingest it and hope other civilizations that we come across don't find out until after we've stripped their planet(s). ;)
Jun
17
awarded  Citizen Patrol
Mar
4
awarded  Editor
Mar
4
revised What will happen to life on Earth when the Andromeda and Milky Way galaxies collide?
added 343 characters in body
Mar
4
awarded  Teacher
Mar
4
answered What will happen to life on Earth when the Andromeda and Milky Way galaxies collide?
Dec
10
accepted Is the rotation of the Sun and the rotation/orbit of the Moon around the Earth a coincidence?
Dec
9
awarded  Scholar
Dec
9
awarded  Supporter
Dec
9
awarded  Autobiographer
Dec
9
awarded  Student
Dec
9
asked Is the rotation of the Sun and the rotation/orbit of the Moon around the Earth a coincidence?