Arguably, the biggest reason Sailor Uranus and Sailor Neptune’s relationship is stronger than Tuxedo Mask and Sailor Moon’s is because Haruka and Michiru actually enjoy being together.

Back when Voyager 2 visited Neptune and Uranus, it discovered something unique about the planets' magnetic fields. By way of comparison, Earth's magnetic field is created by swirling molten iron ...

A 1986 image of Uranus and a 1989 image of Neptune released shortly after each Voyager 2 flyby, compared with the study’s reprocessed images of the planets that better approximate their true colors.

Some estimates suggest Uranus and Neptune may each have 50,000 times the quantity of water in Earth's oceans. But the authors of the new study say these models ignore the way the ice giants formed.

The brighter of Neptune's two new moons is provisionally named "S/2002 N5." At 14 miles (23 km) wide, this newly discovered satellite seems to be in a 9-year orbit around Neptune.

In the case of Uranus, the core is the size of Mercury, and Neptune’s is slightly larger, more Mars-size. Previously, scientists had thought the interiors of the two planets would be more mixed.

Neptune, named after the god of the sea, has 14 moons. All of them represent Greek and Roman water mythology. The largest moon is Triton, which is nearly as large as Earth’s Moon.

The images of Uranus, the seventh planet from the sun, and Neptune, the eighth planet, were collected in 1986 and 1989, respectively, as NASA's Voyager 2 spacecraft headed out of the solar system.

Astronomers have used telescope data to color-correct Voyager 2 images of Neptune and Uranus, revealing that the planets have a similar greenish blue hue.

In contrast, Uranus, Neptune's planetary neighbor and the first to be discovered with a telescope, appeared noticeably paler. Both seemingly twin worlds have a lot in common.

Our ideas of the colours of the planets Neptune and Uranus have been wrong, research led by UK astronomers reveals. Images from a space mission in the 1980s showed Neptune to be a rich blue and ...

Uranus’ shifting colors can be partly explained by atmospheric methane. Because methane absorbs red and green light, the equator ends up reflecting more blue light; by contrast, the poles, which ...