Alien Planet with Earth's Mass Discovered ... But It's an 'Iceball'

Alien Planet with Earth's Mass Discovered ... But It's an 'Iceball'

A newfound alien world is quite Earth-like in some ways, but you wouldn't want to live there. The astronomers spotted it using a technique called gravitational microlensing, which involves watching what happens when a massive body passes in front of a star. The closer object's gravity bends and magnifies the background star's light, acting like a lens.