An artist's conception of the ACTS just after release from the space shuttle's cargo bay in September of 1993.
The history of space exploration is rich with photos from NASA that detail the history of space travel, breakthrough propulsion systems, groundbreaking astronauts and missions, and robotic exploration. Each weekday, SPACE.com looks back at the history of spaceflight, from the early days of the space race through the space shuttle era, from the years of the first rockets and satellites to the test-flight era that preceded human spaceflight, and of course beyond.
An image shows the orange-soil discovered during the second Apollo 17 EVA and the gnomon, a geology hand tool used by astronauts.
The Deep Space 1 Technology Demonstrator features many new technologies, but none so high-tech as the ion propulsion system.
Astronaut Kathy Thornton prepares to release the damaged Hubble Space Telescope array after removing it.
Former President Jimmy Carter presents the National Space Club's Goddard Memorial Trophy to NASA Administrator Dr. Robert A. Frosch for efforts in the Voyager mission.
A seamstress, with assistance from three others, creates a possible replacement sunshade for the Skylab Orbital Workshop.