Additional Moon for Neptune

Astronomers using the NASA/ESA Hubble Space Telescope, along with older data from the Voyager 2 probe, have revealed more about the origin of Neptune’s smallest moon. The moon, which was discovered in 2013 and has now received the official name Hippocamp, is believed to be a fragment of its larger neighbour Proteus. http://sci.esa.int/hubble/61142-hubble-helps-uncover-origin-of-neptune-s-smallest-moon-hippocamp-heic1904/  

Neptune-ring-arcs