DETLEV VAN RAVENSWAAY / SCIENCE PHOTO LIBRARY DETLEV VAN RAVENSWAAY / SCIENCE PHOTO LIBRARY
Voyager program. Plate commemorating the USA's Voyager space program. Voyager is an ongoing astronomical program employing two robotic space probes Voyager 1 and Voyager 2 to study the outer solar system. They were launched in 1977.
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