Atom & Cosmos

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Supernova

FLASH OF LIGHT  Type 1a supernovas, such as the one seen in this Hubble Space Telescope image, can be triggered in at least two different ways, new research shows.

Europa

PINCH OF SALT  Colored bands and patches on the surface of Europa might come from irradiated sea salt deposited by a subsurface ocean.

Three boulders (shown) balance precariously on comet 67P/Churyumov-Gerasimenko in this Sept. 16 image taken 29 kilometers above the surface by the Rosetta spacecraft

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