Stock Photo - Apr. 11, 1970 - Seventh manned Apollo crew: The members of the prime crew of the Apollo 13 lunar landing mission are (l to r), Astronauts James A. Lovell; Thomas K. Mattingly, and Fred W. Haise. they are seated in front of a scene of the Lagoon Nebula, with the mission insignia and two items of early navigation in the foreground. Represented in the Apollo 14 emblem (center) is Apollo, the sun god of Greek mythology, symbolizing that the Apollo flights have extended the light of knowledge to all mankind. The Hindu astrolabe in Sanskrit (on right) was used to predict the position of celestial bodies before the invention of the octant and sextant. The octant 9 on left) was used in 1790 to determine the altitude of celestial bodies from aboard ship. The third manned lunar landing mission is scheduled for April 11, 1970. (Credit Image: © Keystone Press Agency/Keystone USA via ZUMAPRESS.com)