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The science behind NASA’s ‘ghost hand’ image

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Two of NASA’s orbiting X-ray observatories have combined efforts this Halloween, imaging a ghost hand reaching out to us from space. But all is not as it appears. This skeletal hand is actually the glowing gas of a pulsar wind nebula. This nebula, energized by the super-hot, super-magnetic remnant of a star that exploded someContinue reading "The science behind NASA’s ‘ghost hand’ image"

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