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ANI / The Hindu / http://www.thehindu.com/sci-tech/article2351092.ece.
NASA has released a Hubble Space Telescope image of a brightly glowing, giant cosmic necklace of a recently discovered planetary nebula, aptly named ‘Necklace Nebula’.
The nebula, situated 15,000 light—years away in the constellation Sagitta, consists of a bright ring, measuring 12 trillion miles across, dotted with dense, bright knots of gas that resemble diamonds in a necklace. The knots glow brightly due to absorption of ultraviolet light from the central stars.
A pair of stars orbiting very close together produced the nebula, also called PN G054.2—03.4.
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