Neptune’s supersonic winds and icy storms revealed a planet so extreme that it forever changed our picture of the solar ...

A day on Neptune lasts precisely 15 hours, 57 minutes and 59 seconds, according to the first accurate measurement of its rotational period made by University of Arizona planetary scientist Erich ...

Not long after Neptune completed its first orbit around the sun since its discovery in 1846, scientists have managed to calculate the exact length of one day on the distant gas giant planet. Unlike ...

Not long after Neptune completed its first orbit around the sun since its discovery in 1846, scientists have managed to calculate the exact length of one day on the distant gas giant planet. Unlike ...

Not long after Neptune completed its first orbit around the sun since its discovery in 1846, scientists have managed to calculate the exact length of one day on the distant gas giant planet. Unlike ...

NASA's Hubble Space Telescope has been used to assemble a time-lapse color movie showing a full 16-hour rotation of the distant planet, Neptune. The movie, made from a series of Hubble observations ...

Neptunians presumably already knew this. A day on the gaseous giant apparently doesn't last 16 hours and six minutes, as we Earthlings have long thought. Instead, according to University of Arizona ...

Next week, Neptune will complete its first full orbit of the Sun since it was discovered in 1846. The blue planet, the farthest out in the Solar System, remains one of Earth's most mysterious ...