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News: USA showered by a watery comet ~11,000 years ago, ending the Golden Age of man in America
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Halloween Pictures: Ten Spooky Objects in Outer Space

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Raychel
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« on: October 30, 2011, 04:13:08 am »



Zombie Star

Image courtesy CXC/NASA/CAS

When a sunlike star dies, it swells up and eventually sheds its outer layers of gas, leaving behind a corpse known as a white dwarf. But sometimes the stellar dead come back to life by feeding from nearby companions.

Such "zombie" stars are known to astronomers as Type Ia supernovae, violent explosions that happen when white dwarfs consume so much material from neighbors that they reach a defined mass limit and explode.

The brilliant burst above, dubbed Tycho's supernova remnant, is perhaps one of the most famous examples of a Type Ia supernova. (Also see "'Supernova in a Jar' Offers Peek Inside Star Death.")
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