Voyager visits Neptune
Voyager 2 captured this remarkable close-up view of Neptune two hours before its closest approach on August 15, 1989. “Clearly visible for the first time were long light-colored cirrus-type clouds floating high in Neptune’s atmosphere,” NASA explains. “Shadows of these clouds can even be seen on lower cloud decks.” Like Uranus, Neptune’s blue coloring arises from the presence of atmospheric methane.
