Neptune
Neptune is our Solar System's outermost planet, and the densest of them all. Thirteen moons orbit this ice giant planet, including Triton. When NASA’s Voyager 2 visited in 1989 it observed Neptune’s now famous Great Dark Spot, about the same size of Earth. Neptune has five rings of varying density and size, Galle, Le Verrier, Lassell, Arago and Adams, named after notable astronomers who studied the planet.
Neptune in opposition tonight: How to see the elusive blue planet at its brightest
As the big blue planet comes into opposition, you’ll need to know where to look. Here's how to maximise your chances.
Hippocamp, Neptune's newest moon, had a violent past
Discovered in 2013, the Neptune's smallest-known may be a chunk of its larger neighbour moon, Proteus.
Who really discovered Neptune?
Both Johanne Galle, left, and John Couch Adams, right, made claims for the discovery of ‘The Last of the Great Gas Giants’.
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Extraordinary new compounds could exist in gas giants
Scientists use advanced computer modelling systems to establish molecular structure of planets like Uranus and Neptune with incredible results.
Could Neptune and Pluto ever collide, as their orbits intersect?
New Horizons captured the public's imagination with stunning new images of Pluto. Could we lose this dwarf-planet to its neighbour, Neptune?