Comet lander Philae may be sitting on an object teeming with alien microbial life, according to two leading astronomers.

Water — but not as we know it — has been found around the comet that the Rosetta probe landed on last month.

Comet-chasing space probe Rosetta has reached its destination after a journey lasting more than a decade.

A comet-chasing space probe that has been in hibernation for almost three years has woken up this evening and sent its first signal back to Earth.