John Grunsfeld has a model of the Hubble Space Telescope on his bookshelf. It’s right next to a model of a NASA space shuttle, which delivered Hubble to space 35 years ago, and it’s no secret why both are there.
Grunsfeld, a former NASA astronaut…
How the Hubble Telescope became the ‘Energizer bunny of spacecraft,’ according to one of its astronaut visitors
