Rosetta mission: Robot making historic descent to comet

A European spacecraft is on course for the first, historic landing on a comet.
Scientists have now released the first pictures from the lander after separating from its "mothership", Rosetta.
The mission will shine a light on some mysteries surrounding these icy relics from the formation of our Solar System.
Philae was dropped towards Comet 67P/Churyumov-Gerasimenko by the European Space Agency's Rosetta satellite at 08:35 GMT.
David Shukman explains how the Philae probe will try to land on the comet
Confirmation of touchdown is expected at Earth sometime around 16:00 GMT.
Success would be a first for space exploration - no mission has previously made a soft landing on a comet. Part of the difficulty is the very low gravity on the 4km-wide ice mountain. Philae needs to be wary of simply bouncing back into space, according to a news agency.