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Dec
3
revised Why does the distance between Sun and Earth stay the same?
added 616 characters in body
Dec
3
revised Why does the distance between Sun and Earth stay the same?
improved title
Dec
2
revised Why does the distance between Sun and Earth stay the same?
added 152 characters in body
Dec
2
answered Why does the distance between Sun and Earth stay the same?
Dec
2
comment Why does the distance between Sun and Earth stay the same?
did you mean to ask why the Earth-Sun distance remains unchanged?
Dec
2
awarded  Citizen Patrol
Dec
1
comment Likelihood of a stable system with a dwarf planet's orbit inside that of a gas giant
The orbit of a dwarf planet in the inner planetary system is almost certainly chaotic and hence unstable, unless it is in orbital resonance with a major planet.
Dec
1
answered Why isn't the moon dark in a solar eclipse?
Dec
1
revised What is “Median Stellar Mass”?
responded to comment.
Nov
30
answered What is “Median Stellar Mass”?
Nov
29
comment Why does the face of the moon 'sync' with the earth?
This is not a force, but radiation. Radiation also decays like $r^{-2}$, like gravitational forces (both is simple geometry).
Nov
28
comment How is the maximum density in a circumstellar disk determined?
If $r$ is the spherical radius (which is the usual convention for this symbol), then this is not a disc at all... If it is cylindrical radius, it is not a disc either, but a cylinder, since there is no $z$ dependence.
Nov
28
comment Why does the face of the moon 'sync' with the earth?
realitively weak forces such as gravitation lol. If you meant "gravity", that's the weakest force on small scales, but the only force on large scales. So it doesn't matter that it's "weak".
Nov
28
comment What is a low mass Black Hole?
That paper made the term "low-mass black holes" up. Moreover, it starts from a wrong premise, namely that the formation of supermassive BHs after $10^8$ years is a problem and hence requires some drastic solutions. All ideas that BHs can simply form from the direct collapse of gas are wrong, as they violate the Eddington limit by many orders of magnitude.
Nov
25
answered What is a low mass Black Hole?
Nov
23
answered How do you calculate the effects of precession on elliptical orbits?
Nov
18
comment Is there enough hydrogen left after a star dies so another star will have enough to light up?
oops. yes, thanks.
Nov
18
revised Is there enough hydrogen left after a star dies so another star will have enough to light up?
edited body
Nov
18
answered Is there enough hydrogen left after a star dies so another star will have enough to light up?
Nov
17
awarded  Enlightened