Astronaut uses Twitter to detail training

HOUSTON, April 6 (UPI) -- A U.S. astronaut says he's using Twitter to detail his last weeks of training for the fifth servicing mission to the Hubble Space Telescope.

Astronaut Michael Massimino -- whose Twitter username is Astro_Mike (@Astro_Mike) -- will fly aboard space shuttle Atlantis during the STS-125 mission, scheduled to be launched May 12. The 11-day flight will include five spacewalks to refurbish and upgrade Hubble with state-of-the-art science instruments designed to extend the telescope's lifetime through at least 2014.

It will be Massimino's second trip into space. He flew on the STS-109 mission to Hubble in 2002, performing two spacewalks. Along with Massimino, the crew of Atlantis includes Commander Scott Altman, Pilot Gregory Johnson and astronauts Andrew Feustel, Michael Good, John Grunsfeld and Megan McArthur.

Massimino's tweets are available at http://twitter.com/Astro_Mike.