An image of Mercury taken during Messenger's second fly-by in October 2008 (Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington)
NASA has reported that its MESSENGER spacecraft is now in orbit around the planet Mercury – the first ever mission to achieve this feat. More than 40 years on from the first moon landing in the age of the Mars rovers and space tourism, it's easy to overlook just what a remarkable a feat this is. These amazing facts might just jolt our sense of wonder – before reaching orbit on Thursday at approximately 9 pm EDT, MESSENGER traveled for six and a half years and covered 4.9-billion-miles in which it went through three flybys of Mercury, one of Earth and two of Venus. After firing its main thruster for 15 minutes the spacecraft slowed by 1,929 mph (leaving around 10 percent of fuel in the tank for orbit correction maneuvers) and it is now in a 12 hour elliptical orbit around the innermost planet some 96.35 million miles from Earth.