TritonAs scientists marvel over the latest data and pictures from Voyager 2 as it leaves Neptune, images of the planet’s large moon Triton prove to be jaw-dropping. Active geysers blast dark material – possibly evidence of cryovolcanism – over the moon’s mottled surface, and an atmosphere is measured. Virtually no craters caused by meteor impacts are spotted, meaning that Triton’s surface is geologically active – all completely new discoveries to Earth-based scientists. Perhaps the most frustrating part of all of the new information is that no further missions to Neptune are in serious consideration by NASA to follow up on Voyager 2’s discoveries.