For so many nerds, the Hubble space telescope feels more like a friend than a hunk of metal in the cold vacuum of space -- a friend whose job you're super jealous of. The 'scope, which launched on the space shuttle Discovery in 1990, has sent back some of the most incredible images from the final frontier -- over 1.3 million observations of planets, galaxies and more, all while hurling about our planet at 27,359km/h from its vantage point in low Earth orbit.