John Mace Grunsfeld

The Space Shuttle lifting off and headed for the nether regions of space, although a majestic sight, is one of the most grueling and critical parts of the space mission because of all the raw power and energy expended by the craft. NASA astronaut John Mace Grunsfeld knows the experience well. He's flown on five Shuttle missions between 1995 and 2009, including a 16-day mission of ultraviolet observations with the Astro observatory, in addition to the fifth mission to the Russian Mir space station, and three servicing missions to the Hubble Space Telescope (including the final Hubble…