India's Mangalyaan, made to last 6 months, completes 3 years
India's first mission to Mars, Mars Orbiter Mission, has successfully completed three years in orbit, despite being designed to last only six months. Mangalyaan, which reached its Martian orbit on September 24, 2014, using least amount of fuel possible, is the cheapest Mars mission in history. It was launched utilising a unique Earth-Mars arrangement that occurs once in 780 days.