JULIAN BAUM / SCIENCE PHOTO LIBRARY JULIAN BAUM / SCIENCE PHOTO LIBRARY
Twelve years after launch, Voyager 2 approaches its last port of call in the Solar System, the planet Neptune, in this artwork by Julian Baum. Targeted for a flyby of the planet's north pole on 24/Aug/89, Voyager will then descend sharply to rendezvous with the Neptune's giant moon, Triton. Neptune is the fourth largest planet in the Solar System and the outermost of the four great gas giants. Its atmosphere consists mainly of hydrogen and helium, but visual observations reveal a faint bluish tinge which may indicate the presence of a thick cloud layer which scatters blue light in much the same way as Earth's atmosphere does.
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