Voyager 1 is Traveling Through Interstellar Space


An artist's impression (circa 1977) of the trajectory taken by NASA's Voyager 1 and Voyager 
2.  Space Frontiers/Getty Images
An artist's impression (circa 1977) of the trajectory taken by NASA's Voyager 1 and Voyager 2. Space Frontiers/Getty Images

NASA's Voyager 1 spacecraft is celebrating its 40th year in space this year. Learn more about its journey on this episode of BrainStuff.