Space

A team of researchers say long held beliefs about how stars are formed have been just a myth, and they say this astronomy myth got busted using a set of galaxies found with CSIRO's Parkes radio telescope.

When interstellar gas collapses to form stars, the stars range from massive to minute.  Since the 1950s many astronomers have believed that in a family of new-born stars the ratio of massive stars to lighter ones was always about the same — for every star 20 times more massive than the Sun or larger, you'd get 500 stars the mass of the Sun or less.
What do you do with a petabyte of data?

The question came up during a lunch today with two NASA computing people, on in IT and the other in supercomputing.  Modern satellites are returning petabytes of data, and there are many satellites.  This is far more than any human can expect to personally look at, and in fact more than they can fit into their local machine.  How do we make these huge amounts of data useful?

We can't ship it to the user's desktop-- there's no room, it'd take forever, and the user doesn't have tools that can browse massive data sets.
From io9:

Groan.  Did I just pun?  I hate puns.
My kids asked me if there was enough water in the universe to quench the Sun.  I voted yes, but of course science isn't about voting, but about verifiable facts.  So now the explanation.

The Sun has a mass of around a third of a million Earths.  Stealing a figure from MadSci.org, the mass of water on the Earth is 1/4400 the total mass.  We'll say we need enough water to completely douse every atom in that fusion-burning puppy we call Sol, so we'll need... 4400 * 0.3 * a million Earths. 

This works out neatly to just over a billion Earths, to get enough water to douse the Sun.

The Big Bang is believed to have created a flood of gravitational waves that still fill the universe with information about its existence immediately after the Big Bang. These waves would be observed as the "stochastic background," analogous to a superposition of many waves of different sizes and directions on the surface of a pond. The amplitude of this background is directly related to the parameters that govern the behavior of the universe during the first minute after the Big Bang.

RCW 38 is a dense star cluster about 5500 light years away in the direction of the constellation Vela (the Sails). Like the Orion Nebula Cluster, RCW 38 is an embedded cluster, in that  clouds of dust and gas still envelop its stars.

Inside RCW 38, young stars bombard fledgling suns and planets with powerful winds and blazing light and some short-lived, massive stars explode as supernovae, whick sometimes cooks away the matter that would otherwise form new solar systems.

Did our own solar system form  in that sort of hellish environment?
The mystery of the solar corona may be resolved.  ScientificBlogging has covered this, as did space.com, Space Fellowship, and other sites.  Two of them couldn't resist the same money quote, too:
"Why is the sun's corona so darned hot?" said study member

James Klimchuk of NASA's Goddard Space Flight Center in Greenbelt, MD.
Why is this useful?
Our society is saturated with GPS, or Global Navigation Satellite System (GNSS), applications. GPS is the first GNSS and it is operated by US Air Force. Most people are not aware of the fact that GPS was developed and is run by the military. A reduced quality signal is released for civil use. After Europe decided to build their own GNSS, called Galileo, the US Air Force decided to released an improved signal. It was and is a matter of competition.




NASA scientists have discovered glycine, a fundamental building block of life, in samples of comet Wild 2 returned by NASA's Stardust spacecraft.

"Glycine is an amino acid used by living organisms to make proteins, and this is the first time an amino acid has been found in a comet," said Dr. Jamie Elsila of NASA's Goddard Space Flight Center in Greenbelt, Md. "Our discovery supports the theory that some of life's ingredients formed in space and were delivered to Earth long ago by meteorite and comet impacts."

If you have never seen a fireball lighting up the night sky I bet you will appreciate the video below, which was taken by Ivaldo Cervini over Italian skies a few days ago. It is a Perseid meteor, which lit up at a visual magnitude of approximately -10 (for comparison, the brigthest Venus can get is -4.5, and the full moon is -12.5: -10 is roughly 200 times brighter than Venus, and a tenth of the full moon).