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Nov
5
comment Synthesising types of galaxies using various stellar spectra
For the simple kind of synthesis you want to do, you probably want to have a look on Faber (1972) paper. For more complicated stuff (with a proper Initial Mass Function and a Star Formation History), you will definitely want to have a look on the Bruzual & Charlot (2003) paper.
Nov
4
revised How dense are Saturn's rings?
Correct some mistakes in the answer, plus add crunchy details (actual estimate of the density, and illustration of the optical depth)
Nov
3
comment Why is our solar system “tipped” about 63° with respect to the plane of our galaxy?
You can have a look on the Kepler data, that shows the same kind of trend (lots of exoplanets with large axial tilt). So it seems that our Solar System is not very generic, but it isn't weird either from a statistic point of view. And actually, our situation is easier to understand from a physical point of view than all these tilted systems.
Nov
2
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Nov
2
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Sep
25
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Sep
24
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Sep
23
reviewed Approve oort-cloud tag wiki excerpt
Sep
23
reviewed Approve neutrinos tag wiki excerpt
Sep
23
reviewed Approve neutrinos tag wiki
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Sep
23
reviewed No Action Needed Is the expansion of the universe greater than the speed of light?
Jul
10
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Jul
10
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