Transport & space · 1990

Hubble Space Telescope

A 2.4 m telescope above the atmosphere transforms astronomy.

Launched from Discovery in April 1990, Hubble's flawed mirror was corrected by a 1993 servicing mission. It helped pin the universe's age near 13.8 billion years and co-discovered accelerating expansion. Five Shuttle servicing missions kept it working for over three decades.

See it in the living treeWikipedia