News tagged with ultraviolet radiation

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The Helix nebula: Bigger in death than life

(Phys.org)—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 ...

Oct 04, 2012
3.5 / 5 (2) 2 | with audio podcast

Why NASA studies the ultraviolet sun

(Phys.org) —You cannot look at the sun without special filters, and the naked eye cannot perceive certain wavelengths of sunlight. Solar physicists must consequently rely on spacecraft that can observe ...

Aug 21, 2014
2.3 / 5 (3) 0

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 ...

Dec 10, 2012
5 / 5 (1) 0

Calculate your nitrogen footprint

Carbon footprints are a familiar way to assess how green your lifestyle is, but now you can also measure your nitrogen footprint using a new tool, the N-Calculator.

May 15, 2013
5 / 5 (1) 0

Listening to ancient colors

A team of McGill chemists have discovered that a technique known as photoacoustic infrared spectroscopy could be used to identify the composition of pigments used in art work that is decades or even centuries old. Pigments ...

Sep 02, 2010
4 / 5 (1) 0

Strawberry extract protects against UVA rays

An experiment has shown that strawberry extract added to skin cell cultures acts as a protector against ultraviolet radiation as well as increasing its viability and reducing damage to DNA. Developed by a ...

Aug 03, 2012
4 / 5 (1) 0

Arctic on the verge of record ozone loss

Unusually low temperatures in the Arctic ozone layer have recently initiated massive ozone depletion. The Arctic appears to be heading for a record loss of this trace gas that protects the Earth's surface against ultraviolet ...

Mar 14, 2011
1 / 5 (1) 2

Star birth in Cepheus

(Phys.org) —Watching starbirth isn't easy: tens of millions of years are needed to form a star like our Sun. Much like archeologists who reconstruct ancient cities from shards of debris strewn over time, ...

Apr 01, 2013
1 / 5 (1) 2 | with audio podcast