Triton, Neptune’s largest moon contains many mysteries yet to be discovered. Its attributes have long been unknown to scientists. Photographic images taken by Voyager 2 in 1989 showed glimpses of its true uniqueness. However, still to this day, further investigation is required to greater our understanding. Therefore, it would be the most suitable moon to send a robotic spacecraft to.
In the past, we have only been able to see half of what this moon contains. Through the eyes of Voyager 2 passing by on its mission to study the outer planets, images of a grey, brown moon were taken. In these photos, we saw that the surface contained a thin layer of frozen nitrogen with occasional volcanic plains. It also had scattered geysers which erupted nitrogen gas. Data sent back by Voyager 2 showed that the atmosphere contained mainly nitrogen, although there was a small percentage of methane, mainly due to its volcanic activity. Its mantle is made of ice with a core believed to be a combination of rock and metal; however, this is still undetermined.