Which star hosts the closest known potentially life-bearing world, Proxima b?
Answer
Proxima Centauri
Proxima Centauri is identified as the specific star within the Alpha Centauri group that currently holds the distinction of hosting the nearest known exoplanet considered potentially habitable, Proxima b. Although Alpha Centauri A and B form a binary pair that is visually brighter, Proxima Centauri is the individual stellar neighbor at 4.24 light-years distance where the exoplanet discovery has focused astrobiological efforts. This proximity makes it the immediate target for exoplanet searches outside our solar system.
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