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programming numerical algorithms for astrophysical applications.


Sep
5
awarded  Revival
Sep
4
revised Determining effect of small variable force on planetary perihelion precession
added 2 characters in body
Sep
4
revised Determining effect of small variable force on planetary perihelion precession
changed notation to use v for velocity
Sep
3
revised Determining effect of small variable force on planetary perihelion precession
deleted 2 characters in body
Sep
3
comment Determining effect of small variable force on planetary perihelion precession
See my edited/corrected answer. The formula has changed ...
Sep
3
revised Determining effect of small variable force on planetary perihelion precession
corrected errors in algebra: wrong exponent of (1-e cos(eta)) in orbit average and factor (1-e^2)
Sep
3
revised Determining effect of small variable force on planetary perihelion precession
added 24 characters in body
Sep
3
revised Could the universe have evolved differently?
added 1658 characters in body
Sep
3
comment Could the universe have evolved differently?
You didn't ask it like that ("slightly different").
Sep
3
comment Can the Gaia telescope detect small temporarily captured asteroids near its Lagrange orbit?
Your answer is wrong. The question considered asteroids near Earth's L1 point. Trojans are near L4 and L5. Detectability of the latter doesn't imply that of the former, even if they existed.
Sep
3
comment Can the Gaia telescope detect small temporarily captured asteroids near its Lagrange orbit?
A small object reflects less light and my be below the significance limit of the CCD. From a single scan one only knows "there was something there in this direction" (which is accurate in one dimension and inaccurate in the other), but god know what. This is not a detection.
Sep
2
comment Is there a paper on galaxy mergers in clusters of galaxies?
Actually, asking us for a good reference for something is a bit cheeky. I would think that you should go and search for yourself. It's unlikely that anybody here will know an up-to-date answer without searching. And, don't trust those simulations...
Sep
2
reviewed Approve suggested edit on Is there a paper on galaxy mergers in clusters of galaxies?
Sep
2
answered Fate of the Spiral Arms of the Milky Way and Andromeda
Sep
2
comment Thought experiment about the outskirts of the universe
This question appears to be off-topic because it is about astronomy. Moving faster than the speed of light is unphysical nonsense.
Sep
2
comment Thought experiment about the outskirts of the universe
Let's assume ... a ship that travels in infinite speed This is a astronomy not a fantasy site. Nothing moves faster than the speed of light and no insight can be gained by assuming the opposite.
Sep
2
revised Thought experiment about the outskirts of the universe
edited title
Sep
2
reviewed Approve suggested edit on Thought experiment about the outskirts of the universe
Sep
2
answered Questions about spiral galaxy arms
Sep
2
answered Mechanism for Brown Dwarf Fusion