Alpha Centauri A is a Sun-like G-type star in the alpha-centauri triple system, the closest solar analog to Earth’s Sun at just over four light-years.
Candidate exoplanet (2024-2025 JWST)
jwst’s MIRI coronagraph at 15 microns detected a candidate gas giant at ~2 AU separation, consistent with a Saturn-to-Jupiter-sized planet at ~225 K (−50 °C) — within the system’s habitable zone. The detection remains unconfirmed: it appeared in only one of three JWST epochs in 2024-2025, though earlier Very Large Telescope mid-infrared observations hint at a compatible source.
A cold gas giant is unlikely to host life directly, but its moons could be candidates — analogous to Europa or ESA’s Enceladus concept.
Confirmation paths: more JWST observations, radial velocity follow-up, the nancy-grace-roman-space-telescope (2027), project-blue, and the future habitable-worlds-observatory.