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seen Dec 12 at 17:37

programming numerical algorithms for astrophysical applications.


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
Nov
17
awarded  Nice Answer
Nov
17
comment Is broadcasting the location of Earth to potential extraterrestial civilization regulated?
If they were to watch the TV, they would soon find out (1) the coordinates and (2) that it's not worth to go there.
Nov
17
comment Is broadcasting the location of Earth to potential extraterrestial civilization regulated?
Hmm. don't think this is an astronomy question. Perhaps better at space?
Nov
17
comment Why Jupiter's Great Red Spot is Reddish?
@HDE226868 I accidentally copied (instead of edited) it. I then had to delete one of them.
Nov
16
comment Why Jupiter's Great Red Spot is Reddish?
@Deuterium I find it amazing that you ask this question just 3 days after this press release! What triggered the question?
Nov
16
answered Why Jupiter's Great Red Spot is Reddish?
Nov
10
answered Number density of stars on the Galactic plane