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Jun 29		revised	What is the best catalog of black hole candidates? added 397 characters in body
Jun 28		answered	What is the best catalog of black hole candidates?
Jun 28		comment	What happens to planets as they cross the Galactic equator? @Jim this a Q+A site. There are As to all those Q's. Some have been asked already.
Jun 26		comment	Are there really half-a billion visible supernovae exploding all the time? But interestingly, agrees with my 0.3 billion figure. Which is anpther way of saying that the observed SN rate is consistent with the known star forming rate of the universe and a universal IMF. However, my number does NOT account for observational incompleteness, which there surely must be. But I think JADES is sensitive enough to get the peak in the SN rate at $1<z<3$.
Jun 26		awarded	Good Answer
Jun 26		revised	Are there really half-a billion visible supernovae exploding all the time? added 126 characters in body
Jun 25		comment	Why don’t runaway stars happen more often? There are hardly any open clusters (as a fraction) with ages > a few hunderd Myr. This isn't how they evaporate/disperse.
Jun 25		reviewed	Approve suggested edit on Are there really half-a billion visible supernovae exploding all the time?
Jun 24		comment	Are there really half-a billion visible supernovae exploding all the time? @Miss_Understands There is a plot referenced in astronomy.stackexchange.com/questions/46769/…
Jun 24		comment	Are there really half-a billion visible supernovae exploding all the time? @Miss_Understands yes, massive stars are being born now. Just not as frequently as 10 Gyr ago. Rigel and Sirius (Sirius is a relatively low-mass star and will not go supernova) are Pop 1.
Jun 24		awarded	Enlightened
Jun 24		awarded	Nice Answer
Jun 24		comment	Why don’t runaway stars happen more often? Clusters do dissipate with time. though the close interaction rate between stars is usually only high in the initial star formation stage. Many three body interactions will not impart a velocity high enough to escape the cluster.
Jun 24		revised	Are there really half-a billion visible supernovae exploding all the time? added 176 characters in body
Jun 24		answered	Are there really half-a billion visible supernovae exploding all the time?
Jun 23		comment	Approximate conversion of redshift 'z' to a time and/or distance, when reading papers? Well, I've removed the link to the now-unavailable calculator and just stuck with Ned Wright's calculator, which does the job. @User65535
Jun 23		revised	Approximate conversion of redshift 'z' to a time and/or distance, when reading papers? deleted 100 characters in body
Jun 23		comment	Approximate conversion of redshift 'z' to a time and/or distance, when reading papers? Ah, I see the FermiLab one has closed shop.
Jun 23		comment	Why don't stars 0.5<m<0.8 solar masses undergo a helium flash? OK, but you are still claiming there is some in-between mass where there is He ignition, but no flash. Is that true? Because that IS what the question is about.
Jun 23		comment	Why don't stars 0.5<m<0.8 solar masses undergo a helium flash? Below 0.5 there is no flash because there is no ignition at all. An important distinction I think.