Astronomers have discovered evidence of a new planet, Proxima d, surrounding Proxima Centauri, the sun's nearest star. The alien world is just a quarter of the mass of Earth and orbits its parent star ...

The candidate planet Proxima d is estimated to be just 25% as massive as Earth. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The sun's nearest ...

Add Yahoo as a preferred source to see more of our stories on Google. Newfound exoplanet 'Proxima d' is one of the lightest ever discovered Astronomers appear to have found a third planet orbiting our ...

A third planet has been detected orbiting the closest star to our solar system, Proxima Centauri. With a mass one-quarter that of Earth, the planet – known as Proxima d – is one of the lightest ...