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Dec
18
awarded  Altruist
Dec
17
awarded  Investor
Dec
11
reviewed Close How can the Earth's rotation speed up?
Dec
5
revised Do parallel universes exist?
deleted 15 characters in body
Nov
30
revised Is lunar elevation at a given location for a given day unimodal?
added 2 characters in body
Nov
27
revised Calculation of right ascension and declination
edited title
Nov
8
awarded  Nice Question
Oct
31
revised Why is there billowing dust in nebulae?
deleted 107 characters in body; edited tags; edited title
Oct
29
revised Do all the objects in the universe exert force on all other objects?
Mathjaxified
Oct
29
revised Why can't light escape from a black hole?
grammars
Oct
29
revised Milky Way Galaxy from Earth
deleted 12 characters in body
Oct
28
awarded  Nice Answer
Oct
23
awarded  Beta
Oct
23
awarded  Enthusiast
Oct
19
revised How powerful a telescope would allow me to view the astronauts aboard ISS do a space-walk?
deleted 5 characters in body
Oct
19
revised Why is the Earth's center still hot after millions of years?
Grammar
Oct
17
comment Age of the universe
We don't know. Some certainly think so. Very different things.
Oct
16
awarded  Nice Question
Oct
16
awarded  Nice Answer
Oct
13
revised From which country or area is the new moon visible first?
added 17 characters in body; edited title