A star discovery.

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Astronomers have found the tiniest known star, an object just 16 per cent bigger than Jupiter. Named the TR-122, the ser is smaller than some known planets that orbit other stars. The discovery helps astronomers better define a grey area between stars and planets, called "failed stars" or "brown dwarfs."

They're often referred to as failed stars, because they don't have enough mass to trigger the thermonuclear fusion that powers real stars, like the Sun. "This result shows the existence of stars that look strikingly like planets, even from very close by," said Frederic Pont, of the Geneva Observatory which participated in the study. "Isn't it strange to imagine that even...

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