Nasa's search for Earth-like planets outside our solar system suffered a potentially catastrophic setback as its Kepler telescope broke down in orbit ...

Astronomers have discovered two planets potentially able to support life in the same solar system - raising the tantalising possibility of two alien w...

A newly-discovered alien world which looks unsettlingly like Earth could be a "prime candidate" for hosting life, scientists have said. And while i...

There are at least 17 billion Earth-sized planets in our galaxy, scientists have announced. In fact there could be many, many more. Astronomers ...

Seen from afar it looks like a giant UFO. The red and yellow alien-craft-like galaxy, called NGC5010, was captured by the Nasa/ESA Hubble Space Tel...