NASA's Mars Exploration Rover Mission (MER) is an ongoing robotic space mission involving two rovers, Spirit and Opportunity, exploring the planet Mars. It began in 2003 with the sending of the two rovers—MER-A Spirit and MER-B Opportunity—to explore the Martian surface and geology.

As 2015 comes to a close we look back at an exciting year of reaching new heights and revealing the unknown for the benefit of humankind.

The Crew Dragon capsule successfully docked with the International Space Station 27 hours after launching into orbit from NASA's Kennedy Space Center on Florida's Space Coast. A new generation of space flight starts now with the arrival of @SpaceX’s Crew Dragon to the @Space_Station. Congratulation

Watch live coverage of the SpaceX Crew-1 launch as four astronauts head to the International Space Station. The Crew Dragon will take off from NASA’s Kennedy Space Center in Cape Canaveral, Fla.

On December 21, 2015, SpaceX landed back their space ship base component, saving millions of dollars for future missions. Elon Musk’s company released a new video of their recent reusable rocket landing at Cape Canaveral. It also announced that it will try once again to land the rocket on a sea bar

A Soyruz rocket launched NASA's Scott Kelly and two Russian cosmonauts into space for what will be a year-long mission aboard the International Space Station. It is NASA's first-of-its-kind study of identical twins to learn more about how long-term spaceflight affects the human body — by sending one

Scott Kelly and his twin brother, Mark Kelly—also an astronaut—were the subjects of the study that sought to find out exactly what happens to the body after a year in space. Scott stayed on the International Space Station from March 2015 to March 2016, while Mark remained on Earth. This was the fina

A revised version of David Bowie's Space Oddity, recorded by Commander Chris Hadfield on board the International Space Station. With thanks to Emm Gryner, Joe Corcoran, Andrew Tidby and Evan Hadfield for all their hard work.

Endeavour has made a night-time touchdown at the Kennedy Space Center in Florida after completing its final mission.

NASA's New Horizons spacecraft has begun beaming back photographs of the surface of Pluto as it approaches the dwarf planet. . Report by Conor Mcnally.