On our cosmic doorstep, a planet has been discovered which could be very similar to Earth. It's a discovery that has rocked the astronomical community. Sir Patrick Moore finds out more about this mysterious new world. Could it be a home from home?

Patrick Moore investigates Robonet, the robotic network of telescopes which spans the globe and links the cosmos directly to a laptop. In their world of permanent darkness these telescopes can react immediately to 'bangs in the night' - the exotic cosmic phenomena such as gamma ray bursts which are over in the blink of an astronomical eye.