This picture of a crescent-shaped Earth and moon -- the first of its kind ever taken by a spacecraft -- was recorded Sept. 18, 1977, by NASA's Voyager 2 when it was 7.25 million miles (11.66 million kilometers) from Earth. Because the Earth is many times brighter than the moon, the moon was artificially brightened so that both bodies would show clearly in the prints.
The Voyager 1 spacecraft.
Voyager 1 took photos of Jupiter and two of its satellites (Io, left, and Europa). The new study says that moons orbiting a gas giant planet greater than 8 Jupiter masses could help astronomers detect a rogue planet.
NASA's twin Voyager spacecraft launched in August and September 1977. Aboard each spacecraft is a golden record, a collection of sights, sounds and greetings from Earth. There are 117 images and greetings in 54 languages, with a variety of natural and human-made sounds like storms, volcanoes, rocket launches, airplanes and animals.
Old and new views of the heliosheath. Red and blue spirals are the gracefully curving magnetic field lines of orthodox models. New data from Voyager add a magnetic froth (inset) to the mix.
This view of the volcanic plains of Neptune's moon Triton was made from topographic mapping of images obtained by NASA's Voyager 2 spacecraft during its August 1989 flyby.
NASA's Voyager 1 spacecraft revealed the kinks in one of Saturn's narrowest rings. The Voyager 1 image (left) was released on Nov. 12, 1980. The closer view of the F ring (right) was obtained by NASA's Cassini spacecraft on April 13, 2005. The moon Pandora is to the left (exterior) of the ring and the moon Prometheus is to the right (interior) of the ring.
A global image mosaic of Jupiter's moon, Ganymede created with images from the Voyager and Galileo missions.
John Casani, Voyager project manager in 1977, shows of a small Dacron flag that was folded and sewed into the thermal blankets of the Voyager spacecraft before they launched 33 years ago. Voyager 2 stands behind him before heading to the launch pad in August 1977. Full Story.
This image shows the locations of Voyagers 1 and 2. Voyager 1 is traveling a lot and has crossed into the heliosheath, the region where interstellar gas and solar wind start to mix.
Artist's concept of NASA's Voyager spacecraft.
Artist concept of the two Voyager spacecraft as they approach interstellar space.
This file image, which does not indicate the current positions of the Voyager probes, shows the solar system's structure.
Close-up of Jupiter's Great Red Spot as seen by a Voyager spacecraft.
Saturn and three moons, Tethys, Dione and Rhea, seen by a Voyager spacecraft on August 4, 1982, from a distance of 13 million miles.
Saturn's northern hemisphere seen on August 19, 1981 from a range of 4.4 million miles by a Voyager spacecraft.
Voyager 2 departs a crescent Uranus on January 25, 1986, here seen from a range of 600,000 miles.
False-color view of Uranus as seen by a Voyager spacecraft.
Neptune's Great Dark Spot, accompanied by white high-altitude clouds, as seen by a Voyager spacecraft.
False color image of Neptune as seen by a Voyager spacecraft.