1,170 reputation
8
bio website
location
age
visits member for 8 months
seen 5 hours ago

programming numerical algorithms for astrophysical applications.


Aug
29
answered What is the relative time difference between us and a star system in outer layer of our galaxy?
Aug
28
comment Why do (most of) the planets rotate counterclockwise, i.e. the same way the Sun does?
Well, I'm not actually very well informed, so don't quote me on this.
Aug
28
awarded  Custodian
Aug
28
reviewed Reject suggested edit on Are there stars that don't emit visible light?
Aug
28
answered World line coordinate finiteness
Aug
28
answered Are there stars that don't emit visible light?
Aug
28
answered Can the Gaia telescope detect small temporarily captured asteroids near its Lagrange orbit?
Aug
27
comment Determining effect of small variable force on planetary perihelion precession
Are you still seeking an answer?
Aug
27
comment Is there a paper on galaxy mergers in clusters of galaxies?
+1 good question. I cannot provide an answer, but in general merging in clusters is rather rare (because the galaxies' mutual velocity is $\sim1000$km/s, much higher than their own velocity dispersion), in contrast to galaxy groups. On the other hand, the central cluster galaxy is almost certainly a merger remnant, but may have merged before the cluster was established. Minor merging activity onto the central cluster galaxy is presumably common.
Aug
27
comment Why do astronomers like green laser pointers?
@abelenky A laser pointer is not astronomical equipment. Lasers are also used in astronomical equipment, for example in artificial guide stars for adaptive optics, but this was not the question.
Aug
26
revised Can we see the Big Bang happen if we look far enough?
reply to a comment
Aug
25
revised How do black holes evaporate?
corrected typo in title
Aug
25
suggested suggested edit on How do black holes evaporate?
Aug
25
comment Which spiral arm of the Milky Way is Kepler-62 in?
Note that there are plenty of stars in between the spiral arms of the Milky Way.
Aug
24
comment Is it possible to extend the life of a star?
+1 this is the only proper answer for this question.
Aug
24
suggested suggested edit on What's an order-of-magnitude main sequence star look like?
Aug
24
comment Why do astronomers like green laser pointers?
this question is not about astronomy
Aug
24
revised Can we see the Big Bang happen if we look far enough?
added 1 character in body
Aug
24
answered Can we see the Big Bang happen if we look far enough?
Aug
22
answered Why do (most of) the planets rotate counterclockwise, i.e. the same way the Sun does?