http://www.eso.org/outreach/press-rel/pr-2007/pr-23-07.html quote Using ESO's VLT, astronomers recently measured the age of a star located in our Galaxy....

Over the years I have heard astronomers repeatedly say two things to the public so many times that they have become common knowledge. My studies have led me...

When talking about the rotation of spiral galaxies, it almost always seems to mean rotating in a plane. I was wondering if it was possible that the galaxy...

Accordingly to Wikipedia http://en.wikipedia.org/wiki/Age_of_the_universe#Cosmological_parameters the Hubble time is defined as: " So a ROUGH estimate of the...

] Joseph Lazio wrote in message ... You're mixing up two different measurements. ...

"TS" == Thomas Smid writes: TS Joseph Lazio wrote in message TS...

Phillip Helbig wrote: "Dark energy" is a newfangled name for the cosmological constant. As Sean Carroll points out, a better name would be "smooth tension". ...

Bob Nelson wrote Is Guth now entitled to a Nobel prize for his work (in spite of his unseemly lobbying). I think it would...

NASA publishes the discovery of a galaxy cluster at 12.6 billion...

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...

The concluding talk on open problems in cosmology was given by Joe Silk. I'll mention below a few things I found particularly interesting. Although the...

Not much work seems to be done nowadays on open (aka hyperbolic) or closed (aka spherical) manifolds, but it's instructive to consider what they would look...

A new paper accepted by ApJL, arXiv:2001.04471 "Nonstationarity of AGN variability: The only way to go is down!" by Caplar et al, concludes that visible quasar...

Jonathan Silverlight wrote in message ... In message...

Dear Colleagues, Vol 12 No 6 of the International Journal of Modern Physics D (IJMPD) is out. Articles are available in electronic format...

A paper by Catanzarite et. al. arXiv:1103.1443 says "Here we show that 1.4% to 2.7% of stars like the Sun are expected to have earth analog planets....Our...

There are 2 rocks in space. As a result of big bang the universe is expanding. Is it the vacuum that is expanding therefor the distance between the rocks or is...

'Oumuamua has a rotation period of 8.1 hours, similar to Kuiper Belt objects implying a common origin in the vast depths of interstellar/intergalactic...

The IAU is considering recommending that the expansion of the universe be referred to as the "Hubble-Lemaitre Law" instead of the "Hubble Law." More details,...

Philip Helbig wrote: quote ..... Why don't you write a paper, submit it to a journal, and post the rejection letter here so that we can see what arguments...