Scientists have found strong evidence of a giant gas planet in the nearest star system to our own.
At four-and-a-half light years away, the lifeless planet would be a close neighbour to Earth in astronomical terms and could have moons that sustain life.
The signs were found in the star system Alpha Centauri by the powerful James Webb Space Telescope.
The potential planet was detected last year, but it had disappeared in follow-up observations. Astronomers must now look again to prove it definitely exists.
Scientists are particularly excited about this discovery because of the similarities between the exoplanet's star and our Sun.
