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visits member for 3 years, 11 months
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Jan
11
revised Can we model gravitation as a repulsive force?
added 18 characters in body
Aug
20
awarded  Popular Question
Aug
11
comment Do all black holes have a singularity?
@Jerry Schirmer. My error.. I meant "the event-horizon for a blackhole of equivlent mass", not the event horizon itself.
Jun
27
comment on what fundamental force is a black hole based on?
I think gravity is the inward force but what is the outward force that keeps it from collapsing to a singularity? (some theories say that the singularity does not exist)
Jun
15
accepted Would the arms of a rotating ice skater still move outwards if there was no other object in the universe?
May
20
awarded  Yearling
May
6
accepted Would we feel the rotation of a rotating habitat?
May
5
comment Would we feel the rotation of a rotating habitat?
I should add that he only have his senses to rely on.
May
4
asked Would the arms of a rotating ice skater still move outwards if there was no other object in the universe?
May
4
asked Would we feel the rotation of a rotating habitat?
May
4
awarded  Teacher
May
4
awarded  Commentator
May
1
accepted Why can't dark matter be black holes?
Apr
19
asked Why can't dark matter be black holes?
Apr
5
comment Can a neutron star compress until it's converted to a black hole?
is it a coincidence that degeneracy pressure of neutron stars is enough to keep it outside the Schwarzschild radius?
Apr
2
comment Can we prove that the universe is finite or infinite?
not necessarily. the universe could be a fractal. en.m.wikipedia.org/wiki/Olbers'_paradox
Mar
23
accepted Why does the homogeneity of the universe require inflation?
Mar
19
comment Given that matter cannot escape a black hole, how did the big bang produce the universe we see today?
wouldn't energy also attract itself due to gravity even if there was no matter in the beginning?
Mar
19
asked Why does the homogeneity of the universe require inflation?
Jan
13
comment Is there a way to create an artificial solar eclipse?
"it would take an object the size of the moon to totally block out its light" is not entirely true. At the distance of the moon, it would indeed take an object the moons size. At half the distance, it would take half the size object (in diameter). If the blocking object is extremely close to the earth's surface, It would need to be much smaller. A large dense cloud can often block the sun completely. However atmosphere scattering would probably not make it completely dark.