This Week's Astronomy

Nasa discovers two Earth-size planets outside our Solar System

Astronomers have spotted the two smallest, most Earth-like planets to be discovered outside our solar system. They are orbiting a star called Kepler-20 almost 1,000 light years away in the constellation Lyra. Reaching the two newly-discovered planets would take the fastest spacecraft more than 4m years. For more info, click here.

Source: The Guardian newspaper