In pictures: Mars landing

One small step - images from the unmanned Phoenix space probe were sent back to Earth after its successful landing on Mars.

Nasa staff had to wait about two hours after the landing for the images which allowed engineers to check for signs of damage.

They also showed the rocky landscape of the northern "arctic" plain where the probe will carry out its work.

Scientists say patterns are similar to what can be found in Earth's permafrost regions.

The surface stereo camera on Phoenix captured this picture of rocks on the ground near where the lander came to rest

A signal confirming the Phoenix lander had reached the surface of Mars was received at 2353 GMT on 25 May.

The Phoenix team reacted with cheers and hugs, although project staff say there will be many more moments of drama.