Neptune is the keeper of the deep: The last known major planet from the Sun, the god of the boundless sea beyond the inner solar system that marks the shore of the black depths of interstellar space.

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

The planets in our solar system weren't always in the order they are today. Four billion years ago, early in the solar system's evolution, Uranus and Neptune switched places, according to new work by ...

Neptune, the eighth planet from the Sun – The Distant Planet. This bright blue orb hanging out near the edge of the solar system has garnered intrigue from sky watchers and scientists alike. Like its ...

A new study into the distant star systems that we discover and observe with the Kepler space telescope and more suggests that a lot of these star system’s outermost planets are likely to be ...

While a pair of NASA rovers explore Mars and the Cassini-Huygens mission peers close at Saturn, two research teams are targeting a more distant planetary quarry, the ice giant Neptune. In separate ...

TEMPE, Ariz. a Quick: What’s the order of the planets in the solar system? Need a little help? Maybe the following mnemonic rings a bell: “My Very Educated Mother Just Served Up Nine Pizzas.” It’s ...