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Resolving Mars methane isotopes, as bio probe? by stargene
The subject of Martian methane blowouts keeps arising. Assuming that they will be confirmed, is there any way yet on-site or in-orbit, to then measure the...
July 2nd 19 05:22 AM
by stargene Go to last post
0 43
Milliquas v6.3 released, now has double-lobed galaxies by Eric Flesch
The Million Quasars (Milliquas) catalogue v6.3 is released with data from publications to 15-June-2019, with the count of type-I quasars & AGN up to 623,004. ...
June 16th 19 03:19 PM
by Eric Flesch Go to last post
0 3
Can someone confirm that I have found some typos in some 1960s Soviet astronomy papers? by Phillip Helbig (undress to reply)[_2_]
Consider the following papers: DZ65: http://adsabs.harvard.edu/abs/1965SvA.....8..854D @ARTICLE { VDashevskiiYZeldovich65a , AUTHOR ...
May 30th 19 03:20 PM
by Phillip Helbig (undress to reply)[_2_] Go to last post
0 3
Reionization by Steve Willner
Not long ago, we had some discussion here of reionization. I've just seen a terrific colloquium by Steve Finkelstein on the subject. It's available...
May 11th 19 07:15 PM
by Steve Willner Go to last post
0 3
Revise age of the universe? by root[_2_]
Can the recent findings of the Space Telescope Institute be used to revise the age of the universe. What would the estimate of 13.7E9 years become if the...
May 10th 19 11:37 PM
by Phillip Helbig (undress to reply)[_2_] Go to last post
8 11
EHT Picture of the black hole in M87 by Tom Roberts
The picture from the Event Horizon Telescope: https://apod.nasa.gov/apod/ap190411.html Why is the center black? Does the accretion disk just happen to be in...
April 27th 19 08:55 AM
by Hannu Poropudas[_2_] Go to last post
6 9
supermassive black holes at z 7 by jacobnavia
A team of astronomers have conducted a search for distant super massive black holes and they have found 83 of them....
March 28th 19 09:56 PM
by Steve Willner Go to last post
1 6
Modelling surface temperatures on Mars by Ryan Pavlick
I am trying to model surface temperatures on Mars. Coming up with insolation received at the various latitudes was fairly simple, the equations are found at...
February 21st 19 06:50 PM
by pyotr filipivich Go to last post
1 1,576
Cosmological Problems by Richard D. Saam
There have been recent cosmological experimental disclosures represented in part by the following: The 7Be(n,p)7Li reaction and the Cosmological Lithium...
(Multi-page thread 1 2)
February 11th 19 07:11 PM
by Edward Prochak Go to last post
14 832
What does it mean in astrophysics for X-rays to be reflected? by Thomas Womack
Various articles about black holes talk about X-rays emitted near the event horizon 'reflecting off the accretion disc'. What kind of material is it that can...
February 5th 19 03:50 PM
by Steve Willner Go to last post
3 865
LIGO sensitivity compared with the human eye by Jos Bergervoet[_3_]
Recently in another newsgroup (nl.wetenschap) the question came up of LIGO's sensitivity compared to the human eye. a) LIGO can (easily) see a source at one...
February 5th 19 03:50 PM
by Steve Willner Go to last post
4 736
Tales of Cataloguing XV -- last fixes in from the cold by Eric Flesch
When fixing catalogue errors one naturally wants to catch them all, but when in so doing you start to encounter new errors caused by your own recent fixes,...
January 29th 19 05:44 AM
by Eric Flesch Go to last post
0 937
Tales of Cataloguing XIV -- the 0th finding chart by Eric Flesch
(This and the previous posting are because I've recently found & fixed a few more mis-positioned legacy objects -- there's always more if you look hard enough,...
January 10th 19 05:56 AM
by Eric Flesch Go to last post
0 471
Tales of Cataloguing XIII -- the first Hazard by Eric Flesch
On the way to building the Million Quasar catalogue, I had the good fortune of email exchanges with Cyril Hazard, a giant of the early quasar discovery days in...
January 8th 19 05:41 PM
by Eric Flesch Go to last post
0 469
library work: where is paper I? by Phillip Helbig (undress to reply)[_2_]
The paper http://adsabs.harvard.edu/abs/1965SvA.....8..854D @ARTICLE { VDashevskiiYZeldovich65a , AUTHOR = "V. M. Dashevskii and...
January 3rd 19 08:36 PM
by Phillip Helbig Go to last post
3 498
dark matter hypothesis by No Name
aIs it possible that the missing mass, the 'dark matter', consists of two generations of burned out stars? These would be short lifetimes, hence large...
(Multi-page thread 1 2)
December 11th 18 09:26 PM
by Steve Willner Go to last post
17 777
Tales of Cataloguing XII -- resolving a caution by Eric Flesch
The "Tales of Cataloguing" series on this forum were about my trail of data fixes along the way to publishing the "Half Million Quasars Catalogue" (HMQ), 2015...
November 26th 18 05:50 AM
by Eric Flesch Go to last post
0 373
Is higher mass-density at higher Z detectable with current probes? by stargene
A question regarding the expansion of the universe: As the Hyperphysics page @ http://hyperphysics.phy-astr.gsu. edu/hbase/Astro/redshf.html shows, the mass...
November 20th 18 07:35 AM
by Phillip Helbig (undress to reply)[_2_] Go to last post
1 403
Axion Dark Matter by Steve Willner
Just want to mention today's colloquium on the subject. It's available at https://www.youtube.com/watch?v=UUEEIaVSVlE At least I hope that link will...
November 16th 18 12:29 AM
by Steve Willner Go to last post
0 398
Spaceship Oumuamua by jacobnavia
Oumuamua is leaving us at high speed. Humans try to follow it with the VLT, and they report that the thing... is accelerating. Accelerating? When I first...
(Multi-page thread 1 2)
November 9th 18 03:35 AM
by No Name Go to last post
12 1,137
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