Labels:text | screenshot | cartoon OCR: SPACE EXPLORATION LUNAR LANDINGS OVERVIEW FIRST ORBIT TOUCHDOWN QUEST MOON RESEARCH LUNAR LANDINGS 2 NEW FRONTIERS SHUTTLE MISSIONS An astronaut is subjected to medical studies in Skylab 2: SKYLAB During the early 1970s NASA carried out the first of four Skylab missions. Skylab was a 100-ton manned space research laboratory. Experiments included studies of the sun and of the earth's resources. Orbiting the earth for 84 days, Skylab 4 broke all previous endurance records. CHRONOLOGY
