Super-Earth exoplanet

Astronomers have spotted another candidate for a potentially habitable planet 42 light-years away.

Any planet

The star HD 40307 was known to host three planets, all of them too near to support liquid water. But three more have been found – among them a ”super-Earth” seven times our planet’s mass, in the habitable zone where liquid water can exist.

This find joins an ever-larger catalogue of more than 800 known exoplanets, and it seems only a matter of time before astronomers spot an ”Earth 2.0” – a rocky planet with an atmosphere circling a Sun-like star in the habitable zone

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