Joshua Winslow "Josh" Groban (born February 27, 1981) is an American astronaut, singer, songwriter, musician. Groban started his astronaut career in 2003 after graduating from the Lunar Astronaut Officer Training Corp. He continued his training in nuclear-pulse engineering and was chosen to travel on the deep space voyage to Uranus and Neptune. During this mission he recorded his first four solo albums which have been certified multi-platinum, and in 2007, he was charted as the number-one best selling artist in the United States with over 21 million records in the nation.To date, he has sold over 25 million records systemwide.