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programming numerical algorithms for astrophysical applications.


Sep
11
comment How many astronomers are there in the world today?
I didn't know your source, but I would have estimated the same number. However, there are many more (about the same number) with a PhD in astronomy who didn't follow it up with an academic career.
Sep
11
answered Milky Way Formation
Sep
11
revised Mechanism for Brown Dwarf Fusion
edited body
Sep
9
revised Determining effect of small variable force on planetary perihelion precession
corrected algebra and summary
Sep
9
revised Determining effect of small variable force on planetary perihelion precession
deleted 190 characters in body
Sep
8
comment When will the Milky Way “arrive” at the Great Attractor, and what all happen then?
Given the accelerated expansion of the universe, is it at all clear that the MW will be arriving there (supposing it it indeed on course)? Note that the mysterious force (coined dark energy) driving the accelerated expansion is opposing the gravitational attractions.
Sep
7
comment Milky Way Formation
Neither, but both!
Sep
6
comment Could the universe have evolved differently?
Well, the underlying hope is that all those fine tunings are only apparent but not real. In other words, the universe naturally obtains an apparently fine-tuned situation in a way still unbeknown to man. In yet other words, the universe only appear fine-tuned because of our ignorance/lack of knowledge.
Sep
6
comment Birthdate differences calculation relative to earths orbit duration
Since birth times are recorded in calender time rather than sidereal or orbital times, you simply take the difference in calender times: You are 365 days (since 1938 was not a leap year) and 18 hours older than your friend.
Sep
6
revised Determining effect of small variable force on planetary perihelion precession
added 80 characters in body
Sep
6
revised Determining effect of small variable force on planetary perihelion precession
fixed minor error in algebra; added minor clarification in conclusion.
Sep
5
comment What known comets are binary?
@PeterHorvath see edit.
Sep
5
revised What known comets are binary?
added explanation to answer comment
Sep
5
comment Are ascending node of sun, the point of intersection of prime meridian and equator and center of earth all collinear?
@SF. Plase promote your comments to an answer.
Sep
5
answered What known comets are binary?
Sep
5
comment Estimating the tangential and cross component of the galaxy's shear using Gnomonic projection
Please elaborate what you mean by shear? When I read the title I thought about the shear in the galactic velocity fields and Oort's constants ...
Sep
5
comment Why are explosions always used to represent the Big Bang?
not a science question .
Sep
5
comment Why are explosions always used to represent the Big Bang?
Where is the evidence? I've not yet come accross the comparison with an explosion.
Sep
5
answered Potential Re-Capture of Rogue Planets
Sep
5
comment Potential Re-Capture of Rogue Planets
voting without commenting is fine and should be the norm. As to your question, I think your first paragraph contains an error: you are interested in objects of the second category (not first); please correct.