The newly detected icy world remains a candidate planet for now.

Proxima b may not be an only child after all.
In August 2016, astronomers announced that a roughly Earth-size exoplanet circles the closest star to the sun, the red dwarf Proxima Centauri, which lies a mere 4.2 light-years from us. (For perspective, the Milky Way galaxy’s spiral disk is about 100,000 light-years wide.)
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https://www.space.com/proxima-centuri-candidate-alien-planet-proxima-c.html