Most planetary systems contain worlds larger than Earth but smaller than Neptune, and the low-density planets around one ...

Thanks to the discovery of thousands of exoplanets to date, we know that planets bigger than Earth but smaller than Neptune ...

A new computational model suggests that Uranus' and Neptune's cores may be less icy than their "ice giant" nickname suggests.

Robotic space probe Voyager 1, the most distant object ever sent from Earth, will reach one light day away from Earth next year, a feat that has taken almost half a century to achieve.

Far from the Sun, Uranus sits tipped on its side, carrying a magnetic system unlike any other planet’s. Its equator tilts about 97.

Nearly four decades after Voyager 2 skimmed past Uranus, a fresh look at its measurements is reshaping what scientists thought they knew about the ice giant’s strange magnetic environment. By ...

New computer models of Uranus and Neptune suggest these distant worlds might be rock giants rather than pure ice giants. The simulations allow everything from water-rich planets to ones where rock ...

Space.com reports that new analysis of Voyager 2 data suggests Uranus may have been experiencing a strong solar wind event during the spacecraft’s 1986 flyby. Researchers revisited the measurements ...

William Lassell, an amateur astronomer, discovered Neptune's moon Triton on October 10, 1846, using his self-constructed 20-foot reflector telescope, a mere 17 days after Neptune's initial ...

The eighth and most distant planet from the sun, Neptune, reaches opposition with the sun on Sept.23, when it will be in its best position for viewing for the year. Neptune is too faint to see with ...

Four days before Voyager 2 was launched, Elvis died. Twelve days after Voyager 1 was launched, Cris Collinsworth threw a 99 yard touchdown pass in his first game as a Gator. A year after Voyager 2 ...