"Curiosity" is the fourth NASA surface rover sent to Mars in 16 years. "Curiosity" is also the heaviest robotic wheeled vehicle (at 900 kg) to have ever landed on Mars (The Soviet Union's "Lunokhod 2" lunar rover (1800) used to be the largest with 840 kg). "Curiosity" was launched from Cape Canaveral on November 26, 2011 at 10:02 EST. It successfully landed on Aeolis Palus in Gale Crater on Mars on August 6, 2012, 05:21:27 UTC.