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  • 0 posts edited
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  • 8 votes cast
Sep
30
awarded  Yearling
Jul
21
asked How massive does a planet need to be to create gravitational lensing?
Apr
21
awarded  Quorum
Apr
11
revised Why don't planets and asteroids have (cometary) tails?
added 78 characters in body
Apr
11
comment Why don't planets and asteroids have (cometary) tails?
"...several qualities must be possessed" is a pretty awkward phrase to introduce with an edit. I guess you were just trying to edit enough to meet the minimum?
Apr
10
answered Why don't planets and asteroids have (cometary) tails?
Oct
31
comment Why can't light escape from a black hole?
Ah, I see. The escape velocity is factoring in the "free" velocity you get from gravitational pull if going back down (but angled enough to miss the planet). Is that right?
Oct
30
comment Why can't light escape from a black hole?
jmarina, that's interesting, I haven't heard that. Would you mind providing a link with more info or the name of the effect you're describing?
Oct
29
awarded  Editor
Oct
29
revised Why can't light escape from a black hole?
Adding images and links, making "kips" explanation clearer.
Oct
29
answered Why can't light escape from a black hole?
Oct
23
awarded  Beta
Oct
21
answered How can the orbit of a Kuiper Belt Object be differentiated from the transit of a rogue planet?
Oct
15
answered Long term development of Comets
Oct
7
answered Why is only one side of the Moon visible from Earth?
Oct
3
awarded  Student
Oct
3
asked Why do the Pleiades look clearer when viewed indirectly?
Oct
3
awarded  Supporter
Sep
30
awarded  Teacher
Sep
30
awarded  Precognitive