The Philae spacecraft which landed on a comet last year may have shifted position, making it harder to communicate with the probe, scientists said.

Comet lander Philae has woken up from hibernation after being missing for months.

Comet lander Philae has woken up from hibernation, the European Space Agency has said.

A fridge-sized robot lab hurtling through the Solar System aboard a European probe is about to wake from hibernation and prepare for the first-ever landing by a spacecraft on a comet.