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Tech & Science
One of the Lightest Planets Ever Discovered Could Help Us Find More Habitable Worlds
By Robert Lea On 2/10/22 at 7:00 AM EST
Astronomers have discovered one of the lightest planets ever found and it's orbiting the star right next door to our own, just over four light-years away from Earth.

Confirmation of Proxima d is evidence that a sensitive exoplanet detection method that measures the "wobble" a planet causes around its star can spot smaller planets like Earth that are potentially habitable.

With a mass a quarter of that of Earth, the planet is one of the lightest exoplanets ever discovered. The extrasolar planet, or exoplanet, orbits Proxima Centauri at a distance of 2.5 million miles, 10 times closer to its star than the closest planet to the sun, Mercury. This proximity means that the planet takes just five Earth days to orbit its host star, a red dwarf that is smaller and cooler than the sun.
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