Astronomers find evidence of a third planet around the closest star to the sun.
“We are now able, in terms of instrumental precision, to detect such small signals, which opens the possibility of finding planets like the Earth around stars like the sun in the not-so-distant future,” Faria said.
Only the light from its two brightest stars, Alpha Centauri A and Alpha Centauri B, can be seen with the naked eye. Technically, Proxima is the closest star to the sun — about a trillion miles closer than the others — until its orbit takes it further away in about 25,000 years . But it’s still possible that life could have evolved on at least one of its planets, said Guillem Anglada-Escudé, an astronomer at the Institute of Space Sciences in Barcelona, Spain.in 2016. That planet was found to be about the size of Earth and within Proxima’s narrow habitable or “Goldilocks” zone, where it’s neither too hot nor too cold — “just right” — for oceans of water on its surface.
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