Physics news

Some results from the Large Hadron Collider

At www.physorg.com/print211983845.html ... the large hadron collider has found no signature of microscopic black holes produced in high energy proton-proton collisions. They are predicted to exist in some theoretical models that unify General Relativity with Qantum Mechanics.

Worlds in Collision

At www.sciencedaily.com/releases/2010/12/101209141130.htm .... worlds in collision - actually bashing up against each other - is one hypothesis of the early solar system now being floated. An object the size of Mars, it is said, smashed into the earth and ripped out its guts - producing the Moon. Until now it was thought the Moon owes its existence to one random collision event - but why be shy?

Update on the Sun from yesterday

At www.calderup.wordpress.com Nigel Calder has a post on the Nature paper (see yesterday) about the Sun - and he is like a lot of other commenters, critical of the paper. As co-author, with Henrik Svensmark, of the Chilling Stars, he makes the point the author of the paper has never gone along with the Svensmark hypothesis concerning cosmic rays governing low cloud cover, and has refused to focus on ultra-violet light from the Sun, which does vary more than visible light.

Graphene and Space Time

At www.dailygalaxy.com October 6th Casey Kazan asks - will the physics of graphene show that Space-Time is a mirage? Space time, it is thought, is a fabric that can be altered by the gravity of stars, planets, and matter - may be no more than a mirage according to Peter Horava (see earlier post in September's In the News on the subject of Relativity). The new magic ingredient of graphene may shed some light on the problem - if there is in fact a problem?

Low Sun activity does not diminish warming effects - so it would seem

At www.nature.com/news/101006/full/news.2010.519.html ... a paper in Nature shows that recent low activity on the surface of the Sun does not correlate with cooling. In fact, the amount of visible light reaching the Earth increased which by itself was a big enough factor to lead to further warming at the surface of the Earth. Lots of people are a bit bemused as it has been the consensus view for some time that low sun spot activity equals cooling weather on earth.

Graphene

At http://calderup.wordpress.com/2010/10/05/with-graphene-carbon-scores-again/ was prompted by the award of the Physics Nobel Prize this year to Geim and Novoselov for their work on graphene. Nigel Calder then lets rip into the field of 'buckyballs' and 'nanotubes' which is all about the potential of carbon as a superconductor resistant to the flow of electric currents.

A step closer to the Big Bang? and creating a black hole in the laboratory

At www.physorg.com/print204957530.html an analysis of what has been happening at the Large Hadron Collider in the last couple of months has been submitted to the Journal of High Energy Physics for publication. Physicists have observed a new phenomenon.

Is our universe in the interior of a giant black hole?

This is another post from Casey Kazan at www.dailygalaxy.com 27th Sept ... a paper available at arxiv.org/abs/1007.0587 'Cosmology in Torsion - an Alternative to Cosmic Inflation' by Nikodem Poplawski, who claims that a small change to the theory of gravity might imply our universe has inherited its arrow of time from the black hole in which it was born. Black holes are the cosmic mothers of new universes is a natural progression from a new and simple assumption about the nature of space time.

Einstein and Gravity

At http://calderup.wordpress.com Sept 24th ... there is a post on General Relativity and Einstein which is a favourite theme of Nigel Calder. In the current issue of Science magazine James Chin-Wen Chou et al detected the well known effects of relativity on the rate of time passing  and at the scale of ordinary human activities. Chou's team used laser light in a pair of aluminium-27 optical clocks to show that time can pass more slowly via the effect of motion on time.

An older universe?

At www.dailygalaxy.com September 20th Casey Kazan stirs the pot by asking, could the universe be older than cosmologists think? More powerful telescopes are upsetting the standard textbook theories - there are seeming contradictions. On of them is the discoveryof a large elliptical galaxy that is very distant and dated, by rred shift analysis, to something like 10 billion years ago.