Japan's space agency (JAXA) has made history by successfully landing tworobotic explorers on the surface of an asteroid.
The two small "rovers", which were despatched from the Hayabusa-2spacecraft on Friday, will move around the 1km-wide space rock known asRyugu.
The asteroid's low gravity means they can hop across it, capturingtemperatures and images of the surface.
"Both rovers are in good condition," the agency confirmed on Saturday.
JAXA proudly tweeted pictures from the rovers, which reached Earth via thespaceship Hayabusa-2.
Hayabusa-2 reached the asteroid Ryugu in June this year after athree-and-a-half-year journey.
While the European Space Agency had previously managed to land on an icycomet, this is the first spacecraft to place robot rovers on the surface of anasteroid.
Asteroids are essentially leftover building materials from the formation ofthe Solar System 4.6 billion years ago.
Ryugu is a particularly primitive variety, and studying it could shed lighton the origin and evolution of our own planet.