Astronomy news

Where did Time come from?

At www.dailygalaxy.com July 22nd we also have a piece with the title, 'Did we inherit Time from an earlier universe?' (which includes a video clip). A team of physicists studying the cosmic microwave background, light emitted when the universe was a mere 400,000 years of age, have claimed our view of the early universe may contain the signature of a time before the Big Bang. Their discovery may help explain why we experience Time moving in a straight line from yesterday into tomorrow.

X-Galaxies

'The X-Galaxy: A Cosmic Radio Mystery Solved' is a post on July 22nd at www.dailygalaxy.com in which radio images from the X Galaxy (how it is notated in article) show a bright pair of jets pointing from L to R and a fainter more distant line of radio emissions running in a different direction. There are in fact a class of X-shaped galaxies, so called because of the outline of their radio emissions and not by their actual shape.

A Dark Secret

www.physorg.com/print198949672.html ... is another story that might be a repeat, 'Does the Sun hold a dark secret?' - perhaps dark matter is at the centre of the Sun and cooling down its core. Yes, I'm sure this was a Daily Galaxy storyline - but here it comes from the mouth of the scientist concerned rather than a commentator.

Water on the Moon

www.eurekalert.org/pub_releases/2010-07/uota-urd072010.php this story, sent in by Garry Gilligan, is all about water on the moon - and how new research is turning what scientists thought they knew on its head. The moon was supposed to be bone dry but researchers found 'lunar dew' and not it has been discovered that water itself is more widespread - on the outside and on the inside of the moon. A comparison has been made with water in volcanic systems on earth.

What is the Sun made of?

http://dcoda.amplify.on/2010/07/17/scientists-cant-agree-on-what-the-sun-is-made-of/ is an interesting web site details supplied by Gary Gilligan. Behind its blazing facade the sun is reluctant to give up its secrets. Over the last few years scientists have changed their ideas concerning the chemical make-up of the Sun. There is far less oxygen, carbon and nitrogen that previously theorised and sound waves travel through its interior and ring like a bell.

Supernovae - version three

www.dailygalaxy.com/my_weblog/2010/07/mistery-supernova-may-point-to-unknown-laws-of-physics/ July 16th ... Casey Kazan has been upsetting the readers at Daily Galaxy newsletter once again. He, or she, is being accused of tabloid headlines, and maybe they are right - but it draws the punters. Robotic telescopes have turned astronomers attentions towards exploding stars that seem to indicate unusual physics are taking place.

Asteroids and near earth objects

At http://cosmictusk.com George Howard has placed a New Scientist video of a flight across the Tunguska impact site in Siberia, with some close-ups of Lake Cheko which he thinks resembles a Carolina Bay.

Planetary Tails

National Geographic July 15th http://news.nationalgeographic.com/news/2010/07/100715-alien-planet-comet-like-tail/ is a story about a planet orbiting so close to a star that its atmosphere is being blasted away, forming a gaseous comet-like tail - according to astronomers in the Astrophysical Journal of July 10th.

black hole, cold thunderstorm

At www.physorg.com/print198173823.html researchers have discovered a black hole emitting powerful jets of particles that spew forth some 1000 light years. Black holes are usually associated with X-rays rather than jets of particles (see Nature July 8th).

Gravity and the Big Bang

At www.physorg.com/print198135631.html July 12th ... a paper in Physical Review Letters might cause a stir as it says the theory of gravity as proposed by Arthur Eddington may require a review. Eddington was on an island off the coast of West Africa where he witnessed a solar eclipse and noticed the Sun's gravity bends starlight, an observation he thought which substantiated Einstein's 'general relativity'. Somewhat later, he appears to have had misgivings, and suggested it might mean something quite different.