India's Mangalyaan satellite successfully entered Mars' orbit in September 2014, joining NASA's MAVEN satellite in orbiting Mars. Mangalyaan was one of the most cost effective interplanetary missions ever at $74 million, far less than NASA's $671 million MAVEN mission. India kept costs low by reusing technologies and sending Mangalyaan into Earth orbit first before slingshotting it towards Mars, saving fuel compared to direct launches. Mangalyaan will study the Martian atmosphere and mineral composition to learn more about whether Mars could have supported life.