It seems like yesterday, but on 9 March 2011, five years ago today, the first of three American space shuttles retired. Above, hear William Shatner's wake-up call to the crew of Discovery on 7 March 2011, while they were still in orbit, but soon to come home for the final time.
In 1990, the Discovery crew installed and later maintained the Hubble Space Telescope, which hugely expanded our view of the stars. Image Source: flickr.
Built in 1979, the spacecraft was named after four great ships from the European age of exploration: she took her name from HMS Discovery, commanded by Captain James Cook during his final voyage from 1776 to 1779; Henry Hudson's Discovery, used in 1610–1611 to explore Hudson's Bay and search for the Northwest Passage; the HMS Discovery of the 1875–1876 British Arctic Expedition to the North Pole; and RRS Discovery, which led the 1901–1904 "Discovery Expedition" to Antarctica.
Image Source: The Atlantic.