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seen Jul 18 at 7:39

Jun
4
answered Pulsars with accreting disk in binary system
Jan
19
comment Recommended papers
@Artemisia - These types of code are difficult to set up and can take months to years of research to design and test. Frankly this is well beyond my expertise. I'd suggest posting a new question specifically on how to set up a physically accurate SPH simulation, or contact someone that does this type of work.
Jan
19
comment Recommended papers
@Artemisia - Maybe this paper.
Jan
18
answered Length contraction of a star
Jan
18
comment Recommended papers
@Artemisia - I don't know. It is not common practice to make such codes openly available, so odds are against it.
Jan
18
answered Recommended papers
Dec
22
awarded  Informed
Dec
22
answered Calculate angle of inclination for a certain angle in a planet's orbit?
Dec
21
answered How stable are Lissajous orbits?
Dec
14
answered Is sundial time entirely dependent on solar azimuth?
Dec
13
awarded  Supporter
Dec
13
answered Calculate apsides without knowing eccentricity
Dec
9
comment Find distance from star to star?
When dealing with stars in the milky-way or even galaxies in the local group you are right, and simple flat-space (euclid) works just fine. However, for the very long distances you have to account for light travel time. The universe is expanding and the rate of acceleration has changed in the past. Objects at very different (large) distances can then be thought of as being set at a different age of the universe and therefore at a different sized universe. This is what enters in the equation as 'cosmological' effects.
Nov
27
awarded  Teacher
Nov
27
answered Apparent size of M31