Missions to Neptune

space probe launched by NASA to study the outer Solar System, second furthest spacecraft from Earth after Voyager 1

American scientific program consisting of the probes Voyager 1 and Voyager 2

planned family of uncrewed NASA spacecraft

Proposed NASA Triton lander space probe

spacecraft mission concept by NASA to the outer planets and beyond

NASA space probe proposal to study the giant gas planet Neptune and it's moon Triton

ODINUS (Origins, Dynamics, and Interiors of the Neptunian and Uranian Systems) is a space mission concept proposed to the European Space Agency's Cosmic Vision programme. The ODINUS mission concept proposes to expand the Uranus orbiter and probe mission to two twin orbiters— dubbed Freyr and Freyja, the twin gods of the Norse pantheon. Their primary mission would be to study Neptune and Uranus with one orbiter each. If selected, ODINUS would launch in 2034.

Shensuo (), formerly Interstellar Express, is a proposed Chinese National Space Administration program designed to explore the heliosphere and interstellar space. The program will feature two or three space probes that were initially planned to be launched in 2024 and follow differing trajectories to encounter Jupiter to assist them out of the Solar System. The first probe, IHP-1, would have traveled toward the nose of the heliosphere, possibly performing a flyby of 50000 Quaoar on the way, while the second probe, IHP-2, will fly near to the tail, skimming by Neptune and Triton in January 2038