Saturday, December 21, 2013

ScienceDaily: Stars News

ScienceDaily: Stars News


Starless cloud cores reveal why some stars are bigger than others

Posted: 20 Dec 2013 11:35 AM PST

Massive stars -- those at least 8 times the mass of our Sun -- present an intriguing mystery: how do they grow so large when the vast majority of stars in the Milky Way are considerably smaller? Massive stars -- those at least 8 times the mass of our Sun -- present an intriguing mystery: how do they grow so large when the vast majority of stars in the Milky Way are considerably smaller? To find the answer, astronomers used the Atacama Large Millimeter/submillimeter Array telescope to survey the cores of some of the darkest, coldest, and densest clouds in our Galaxy to search for the telltale signs of star formation.

Birth of black hole kills the radio star

Posted: 20 Dec 2013 08:40 AM PST

Astronomers have discovered a new population of exploding stars that "switch off" their radio transmissions before collapsing into a Black Hole. These exploding stars use all of their energy to emit one last strong beam of highly energetic radiation -- known as a gamma-ray burst -- before they die.

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