The Hubble Space Telescope as seen from the space shuttle Atlantis (STS-125) in May 2009, during the fifth and final servicing of the observatory. Update: April 30, 4:22 p.m. ET: NASA says Hubble ...

Twenty years to the day since Yuri Gagarin flew in Vostok 1, the world’s first reusable spacecraft – and the most complex spacecraft ever built – was launched into orbit by the US.