Astronomy

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neighborhood of stars packed tightly together (illustrated)

ALTERNATE UNIVERSE   A neighborhood of stars packed tightly together (illustrated) might heat interstellar space enough for an orphaned planet wandering nearby to have liquid water on its surface and, therefore, potential for life.

brightest galaxy

WEAR SHADES  Light pours out of the brightest known galaxy (illustrated), which is about 350 trillion times as bright as the sun. 

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.

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