ZF-COSMOS-20115 A dead galaxy, with 3 time more stars than the milky way. Just 1.65 Gy after the supposed bang. Star formation has shutted down there. And...

Is the NET angular momentum of a globular cluster of stars, zero? e.g. Omega Centauri or M13 for example. Is the NET angular momentum of an elliptical...

In article , James Goetz writes: Lord Kelvin's prediction of heat death...

Example object, Pictor A http://chandra.harvard.edu/photo/2016/pictora/ in particular, the x ray Chandra...

Object e.g. http://chandra.harvard.edu/photo/2016/pictora/ Is there an example of an active galaxy with extended million light year long radio and or xray...

Questions (below) relate to total energy (sum of terms) in this paper: In the paper, "The Cosmic Energy Inventory" Fukugita / Peebles, They created a list of...

It's been a while since I've explored this topic. Years ago no one had posited this model and I was told it was wrong. I thought I'd check if anything has...

What are the astrophysical implications of different Hubble constants by Planck https://arxiv.org/abs/1502.01589 Hubble constant 67.8 +/- .9 km/s/Mpc and...

There was some earlier discussion of how early in the universe galaxies could form. I happened to run across a simulation that gives one...

Is there any path anyone knows for me to get some scope time to take some spectra and determine what 7 targets around an interacting galaxy pair are? They are...

After the big bang, the gas was too hot to form stars. A time must pass to cool the universe so that the star formation could begin. In that period of time...

For this plot of quasar Mag vs z https://inspirehep.net/record/1208042/files/Mi_zdist1_dr10.png There is a lower bound for quasar Mag that looks...

I've found a bunch of SFR plots vs z, but haven't yet found an SN rate vs z plot. Does one exist? Ideally, SNII and SNIa plots separated since each produces...

Anyone know what kind of galaxy this galaxy might be? http://skyserver.sdss.org/dr13/en/tools/chart/navi.aspx?ra=186.9189&dec=13.076 It has a ring around the...

] On Wednesday, December 28, 2016 at 5:14:16 PM UTC-5, jacobnavia wrote: Most of the original snipped ... I worked a few hours for this post, and I think...

What are the functional relationships dictating galactic size (presently ~10^22 cm) and star planetary system size (presently ~10^15 cm) contained in a Hubble...

In article , jacobnavia writes: https://arxiv.org/pdf/1603.00461.pdf Published in ApJ...

Hello, I've so far not found any values for numbers of active galaxies vs normal galaxies across time. What percentage of galaxies go through an active...

I would like to do some viewing of the sky using an online viewer. I have tried simbad, though haven't figured it out very well. Is there a tutorial video...

I am looking for tutorial or help to access SDSS data / images. I would like to select an (ra, dec) pair with say 1 arc minute view, then, list quasars within...