News tagged with ultraviolet radiation

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Is the ozone layer on the road to recovery?

(Phys.org)—Satellites show that the recent ozone hole over Antarctica was the smallest seen in the past decade. Long-term observations also reveal that Earth's ozone has been strengthening following international agreements ...

dateFeb 10, 2013 in Earth Sciences
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The wings of the Seagull Nebula

(Phys.org)—This new image from ESO shows a section of a cloud of dust and glowing gas called the Seagull Nebula. These wispy red clouds form part of the "wings" of the celestial bird and this picture reveals an intriguing ...

dateFeb 06, 2013 in Astronomy
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Making stars in early galaxies

(Phys.org)—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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