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Milliquas v5.2 includes SDSS DR14 by Eric Flesch
The Million Quasars (Milliquas) catalogue presents a new release, v5.2, which includes just-published SDSS-DR14 and SDSS-DR14Q data. The count of type-I...
August 15th 17 07:49 AM
by Richard D. Saam Go to last post
1 71
The telescopes of the future by jacobnavia
Caltech has demonstrated a camera without lenses. https://petapixel.com/2017/06/22/caltech-made-sensor-lensless-camera-future/ quote The camera has an...
August 9th 17 06:54 AM
by Martin Brown[_3_] Go to last post
4 83
Acceleration by jacobnavia
A sample of 23 galaxies just 800 million years after the big bang was published by a team of astronomers: https://arxiv.org/abs/1703.02985v3 The article is...
August 2nd 17 07:01 AM
by Richard D. Saam Go to last post
3 70
Will galactic filament indefinitely expand while its galaxy clusters by James Goetz
reference to learn more about event horizons: http://cfpa.berkeley.edu/Education/BHfaq.html -- jt]] Good point about black holes. I neglected that...
July 15th 17 09:59 PM
by James Goetz Go to last post
0 85
Type II or NELG? by Eric Flesch
I can't seem to find a definitive distinction between a galaxy with a type-II narrow-line AGN core and a so-called NELG ("narrow emission-line galaxy"). NELGs...
July 14th 17 12:18 AM
by Steve Willner Go to last post
3 106
Will galactic filament indefinitely expand while its galaxy clusters by James Goetz
I emailed the question to the paper coauthor Michael Hudson, and he replied: In a nutshell, the filaments, like the rest of the Universe will still expand...
July 12th 17 09:10 PM
by James Goetz Go to last post
0 37
Will galactic filament indefinitely expand while its galaxy clusters by James Goetz
I guess that we can track the development of the filaments while the respective galaxy clusters continue to disperse. We should eventually be able to detect...
July 8th 17 06:20 AM
by James Goetz Go to last post
0 71
entropy and gravitation by Phillip Helbig
A smooth distribution corresponds to high entropy and a lumpy one to low entropy if gravity is not involved. For example, air in a room has high entropy,...
(Multi-page thread 1 2 3)
July 5th 17 05:21 PM
by Steve Willner Go to last post
29 323
A new impossible galaxy by jacobnavia
Massive dead disk galaxy challenges theories of galaxy evolution https://www.sciencedaily.com/releases/2017/06/170621145150.htm This galaxy (3 times the mass...
July 5th 17 05:20 PM
by Steve Willner Go to last post
7 107
All-Sky Optical catalogue now available for download by Eric Flesch
My publications are coming to an end, methinks, but throughout I was using a homegrown version of an all-sky optical catalogue, the likes of which seem...
June 20th 17 01:52 AM
by Eric Flesch Go to last post
4 172
The impossible early galaxy (continued) by jacobnavia
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...
May 17th 17 05:26 AM
by jacobnavia Go to last post
2 111
NET Angular Momentum of Globular cluster of stars by No Name
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...
(Multi-page thread 1 2 3)
April 23rd 17 11:59 AM
by Richard D. Saam Go to last post
20 438
How long will star formation endure before the eventual heat death of by Phillip Helbig (undress to reply)[_2_]
In article , James Goetz writes: Lord Kelvin's prediction of heat death...
April 2nd 17 12:46 AM
by jacobnavia Go to last post
4 143
Single vs Double hot spots for BH Jets? (e.g. Pictor A) by No Name
Example object, Pictor A http://chandra.harvard.edu/photo/2016/pictora/ in particular, the x ray Chandra...
(Multi-page thread 1 2)
March 19th 17 08:31 AM
by [email protected] Go to last post
15 504
Geometry of jets, e.g. Pictor A by No Name
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...
February 26th 17 10:34 PM
by [email protected] Go to last post
2 261
Cosmic Energy Budget, vs time by [email protected]
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...
February 26th 17 04:45 AM
by No Name Go to last post
4 246
Galactic Bar Formation? by No Name
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...
February 26th 17 04:41 AM
by No Name Go to last post
2 168
Different Hubble constants by Richard D. Saam
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...
February 9th 17 05:20 PM
by Phillip Helbig (undress to reply)[_2_] Go to last post
7 374
Bluetides simulation by Steve Willner
There was some earlier discussion of how early in the universe galaxies could form. I happened to run across a simulation that gives one...
January 26th 17 07:52 PM
by Steve Willner Go to last post
0 231
How to get scope time to obtain 7 spectra? by [email protected]
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...
January 25th 17 06:51 PM
by Mike Dworetsky Go to last post
2 254
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