Voyager Views Titan s Haze . ... Credit Copyright: Voyager Project , JPL , NASA Explanation: Launched in 1977, 25 years ago today, the Voyager 1 spacecraft's historic tour of the outer Solar System took it past Saturn in late 1980. ... Titan's mostly nitrogen atmosphere, denser than planet Earth's, also contains methane and is thought to be laced with more complex hydrogen and carbon compounds. The composition is likened to Earth's atmosphere before life began. ... NASA Official: Jay Norris. ...