News tagged with ultraviolet radiation

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Making stars in early galaxies

(—Ten billion years ago or so, at least according to the current picture, the youthful universe began to produce an abundance of new stars. The very first ones appeared in the young cosmos after only a few hundred ...

dateDec 10, 2012 in Astronomy
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Review: 3 weather phone apps help you on the go

(AP)—For me, climate change is a serious issue. No, I'm not referring to the debate over global warming. My concerns are much simpler. I'm constantly checking the weather for the hours and days ahead because deciding to ...

dateDec 05, 2012 in Software
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A new class of extragalactic objects

A blazar is a galaxy with an intensely bright central nucleus containing a supermassive black hole, much like a quasar. The difference is that a blazar can emit light with extremely high energy gamma rays that are sometimes ...

dateOct 29, 2012 in Astronomy
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The Helix nebula: Bigger in death than life

(—A dying star is refusing to go quietly into the night, as seen in this combined infrared and ultraviolet view from NASA's Spitzer Space Telescope and the Galaxy Evolution Explorer (GALEX), which NASA has lent ...

dateOct 04, 2012 in Astronomy
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