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largest and brightest x-ray rings observed

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Messier57:
Beautiful image of x-rays from NASA's Chandra X-ray Observatory.

X-ray rings created by neutron star flares can be used to accurately determine distances within the galaxy. These are the largest x-ray rings on record.

Spectacular.



source:
http://www.nasa.gov/press-release/nasa-s-chandra-captures-x-ray-echoes-pinpointing-distant-neutron-star

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