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Video: SDO sees active region outbursts

This close-up video by NASA's Solar Dynamics Observatory shows an active region near the right-hand edge of the sun's disk, which erupted with at least a dozen minor events over a 30-hour period from Nov. 3-5, 2015.  

dateNov 10, 2015 in Space Exploration
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X-ray emission from massive stars

Massive young stars are known to emit strong X-rays. Unlike the X-ray emission from lower mass stars, however, which arises in stellar photospheres, the X-rays from massive stars are thought to result from powerful shocks. ...

dateOct 26, 2015 in Astronomy
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