It has a gossamer-thin atmosphere where parachutes would be useless for any landing probe. “Triton is just a really interesting object,” Ingersoll said, adding that Neptune's partial ring arcs ...

Wind tunnels show what a probe descending into Uranus or Neptune would need to contend with. Such a probe is a high-priority mission for NASA and ESA.

Astronomers have observed a mysterious large dark spot in Neptune’s atmosphere, ... In 1989, NASA's Voyager 2 spacecraft provided the first close-up images of linear, ...

No spacecraft has visited Neptune since. Or Uranus. Planetary scientists, in their recent recommendation to NASA, decided to go with one ice giant over the other simply because Uranus is closer, ...

New images from the space-based observatory offer a novel view of the planet in infrared. By Jonathan O’Callaghan No spacecraft has visited Neptune since 1989, when the NASA probe Voyager 2 flew ...

NASA's New Horizons spacecraft, which visited Pluto in 2015, is embarking on an observing campaign of the ice giant planets Uranus and Neptune – and scientists need your help.

Neptune lies on the outer edges of the solar system, around 3 billion miles (4.8 billion kilometers) away from the Sun. At such great distance, it’s proven difficult to visit the farthest planet ...

The probe crossed the moon's orbit in nine hours and reached Jupiter for a gravity assist flyby in just 13 months, picking up a 9,000-mph velocity boost as it headed out on its lonely voyage to ...

The images are important, especially because only one spacecraft has ever visited Uranus and Neptune. In January 1986, NASA's Voyager 2 reached Uranus after traveling 1.8 billion miles over nine ...