Lost Beagle2 probe found 'intact' on Mars

The missing Mars robot Beagle2 has been found on the surface of the Red Planet, apparently intact.

High-resolution images taken from orbit have identified its landing location, and it looks to be in one piece.

The UK-led probe tried to make a soft touchdown on the dusty world on Christmas Day, 2003, using parachutes and airbags - but no radio contact was ever made with the probe.

Many scientists assumed it had been destroyed in a high-velocity impact.

The new pictures, acquired by Nasa's Mars Reconnaissance Orbiter, give the lie to that notion, and hint at what really happened to the European mission.

Beagle's design incorporated a series of deployable "petals", on which were mounted its solar panels.

From the images, it seems that this system did not unfurl fully.

"Without full deployment, there is no way we could have communicated with it as the radio frequency antenna was under the solar panels," explained Prof Mark Sims, Beagle's mission manager from Leicester University.

"The failure cause is pure speculation, but it could have been, and probably was, down to sheer back luck - a heavy bounce perhaps distorting the structure as clearances on solar panel deployment weren't big; or a punctured and slowly leaking airbag not separating sufficiently from the lander, causing a hang-up in deployment," he told BBC News.

The discovery of Beagle comes less than a year after the death of the probe's principal investigator, Colin Pillinger. The Open University scientist was the driving force behind the project, and although his mission never got to explore Mars, he is credited with sparking a huge enthusiasm among the public for space research.

His wife and fellow Beagle team-member, Dr Judith Pillinger, said: "Colin was always fond of a football analogy. No doubt he would have compared Beagle2 landing on Mars, but being unable to communicate, to having 'hit the crossbar' rather than missing the goal completely.

"Beagle2 was born out of Colin's quest for scientific knowledge. Had he known the team came so close to scoring he would certainly have been campaigning to 'tap in the rebound' with Beagle3 and continue experiments to answer questions about life on Mars."

The Royal Society announced an award in commemoration of Prof Pillinger on Friday.

The outcome will be deeply frustrating to the science and engineering teams behind the project, because they will now realise just how close they came to success.

Indeed, MRO's data confirms that Beagle landed just 5km from the centre of its targeted touchdown zone.

This was an ellipse, 500km by 100km, on a flat, near-equatorial plain known as Isidis. To be off-centre by such a small margin amounts to a bulls-eye.

Beagle2 was carried to the Red Planet by the European Space Agency's Mars Express (MEx) orbiter, which remains in working order today.

MEx released the little robot on to its landing trajectory on 19 December 2003. It even snapped a picture of Beagle, in its entry capsule, receding into the distance. What followed was a mystery.

Various theories were posited for the failure of the probe to make contact after the expected landing time of 02:45 GMT on 25 December.

The Beagle team itself suspected the robot was caught out by a Martian atmosphere that was thinner than the one for which it had planned.

This would have meant it was travelling too fast as it approached the surface.

But the pictures suggest that all elements of the entry, decent and landing (EDL) system did a job.