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third "livepost" from the Texas Symposium on Relativistic Astrophysics by Phillip Helbig (undress to reply)[_2_]
There has been much discussion, including some here in this newgroup, regarding the "tension" between various measurements of the Hubble constant. In general,...
December 20th 19 07:46 AM
by Phillip Helbig (undress to reply)[_2_] Go to last post
0 1,000
second "livepost" from the Texas Symposium on Relativistic Astrophysics by Phillip Helbig (undress to reply)[_2_]
At most of the last few conferences I've been to, including this one,=20 there has been a talk pointing out that primordial black holes could make=20 up most...
December 18th 19 10:54 AM
by Phillip Helbig (undress to reply)[_2_] Go to last post
0 1,040
"live post" from the Texas Symposium on Relativistic Astrophysics by Phillip Helbig (undress to reply)[_2_]
A few weeks ago, fellow moderator Jonathan suggested that I "live-post" from a conference, so I'll do so this week. He was actually thinking about another...
December 17th 19 06:47 AM
by Phillip Helbig (undress to reply)[_2_] Go to last post
0 1,045
Felix Schmeidler, 1985 by [email protected]
Hello! The German astronomer Felix Schmeidler published two works in 1985. "Messung der Lichtablenkung während der Sonnenfinsternis am 15. Februar...
November 14th 19 09:40 PM
by [email protected] Go to last post
0 887
electronic-only publication at Astronomy and Astrophysics by Phillip Helbig (undress to reply)[_2_]
For a while back in the 1990s, A&A published some things (such as appendices to papers) ONLY electronically. However, ftp://cdsarc.u-strasbg.fr doesn't seem...
August 23rd 19 05:43 PM
by Phillip Helbig (undress to reply)[_2_] Go to last post
2 1,111
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 1,230
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
0 829
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
0 815
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
0 792
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
8 861
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
6 866
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 10:56 PM
by Steve Willner Go to last post
1 799
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 07:50 PM
by pyotr filipivich Go to last post
1 2,741
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 08:11 PM
by Edward Prochak Go to last post
14 2,174
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 04:50 PM
by Steve Willner Go to last post
3 1,599
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 04:50 PM
by Steve Willner Go to last post
4 1,395
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 06:44 AM
by Eric Flesch Go to last post
0 1,499
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 06:56 AM
by Eric Flesch Go to last post
0 981
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 06:41 PM
by Eric Flesch Go to last post
0 951
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 09:36 PM
by Phillip Helbig Go to last post
3 1,031
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