NASA's OSIRIS-REx spacecraft has finally arrived at Bennu – a lump of rock orbiting the Sun between Earth and Mars.

OSIRIS-REx was launched in 2016, travelling more than 2 billion kilometres to reach the asteroid known as 101955 Bennu.

TO make the incredibly long journey, the ship made a flyby past Earth to use its gravity to slingshot it into the asteroid's orbit.

It has been sending back increasingly detailed images of its approach, and it now hovering about 7 km above the surface.

ORISIS-Rex will now start taking high-resolution images and map the asteroid's surface.

It will spend about 18 months looking for an ideal spot to collect a sample of space dust to bring back to Earth in 2023.

More information on the OSIRIS-REx mission and equipment is accessible here.