There has been much discussion, including some here in this newgroup, regarding the "tension" between various measurements of the Hubble constant. In general,...

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...

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...

Hello! The German astronomer Felix Schmeidler published two works in 1985. "Messung der Lichtablenkung während der Sonnenfinsternis am 15. Februar...

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...

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...

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. ...

Consider the following papers: DZ65: http://adsabs.harvard.edu/abs/1965SvA.....8..854D @ARTICLE { VDashevskiiYZeldovich65a , AUTHOR ...

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...

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...

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...

A team of astronomers have conducted a search for distant super massive black holes and they have found 83 of them....

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...

There have been recent cosmological experimental disclosures represented in part by the following: The 7Be(n,p)7Li reaction and the Cosmological Lithium...

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...

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...

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,...

(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,...

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...

The paper http://adsabs.harvard.edu/abs/1965SvA.....8..854D @ARTICLE { VDashevskiiYZeldovich65a , AUTHOR = "V. M. Dashevskii and...