Human Spaceflight, Today in the History of Astronomy April 12, 1981: Columbia lifts off for the first space shuttle mission
Human Spaceflight, Today in the History of Astronomy April 11, 1970: Apollo 13 blasts off for the Moon
Human Spaceflight, Robotic Spaceflight, Today in the History of Astronomy April 7, 1991: Compton Gamma Ray Observatory is deployed
