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

The planet Neptune shines a serene blue in this image assembled from two photos by NASA's Voyager 2 probe during its historic flyby of the planet in August 1989. Neptune reaches an orbital milestone ...

What's the coldest, windiest place in the solar system? No, it's not Duluth, Minn. It's Neptune, which is also the farthest planet. Today the Earth and Neptune are 2.7 billion miles (4.3 billion km) ...

Neptune’s supersonic winds and icy storms revealed a planet so extreme that it forever changed our picture of the solar system. The discovery of Neptune in 1846 was not just the triumph of mathematics ...

Neptune and Uranus are the seventh and eighth planets from the sun, and as such share a lot of the same characteristics.

Using the European Southern Observatory’s (ESO) Very Large Telescope (VLT), astronomers have seen a large dark spot in Neptune’s atmosphere, with an unexpected smaller bright spot next to it. Experts ...

Perhaps the most intriguing exoplanets found so far are those bigger than our rocky, oceanic Earth but smaller than cold, gas-shrouded Uranus and Neptune. This mysterious class of in-between planets ...

The newly identified cluster of Kuiper Belt objects lies about 4 billion miles from the Sun, offering fresh clues about how ...

Astronomers have observed a gigantic storm system about the size of Earth near Neptune's equator, a region where no bright cloud has ever been seen before. File photo shows the orbits of several moons ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. A planet’s opposition occurs when Earth passes between it ...

Three newly discovered worlds are among the smallest and nearest we've ever detected. NASA's Transiting Exoplanet Survey Satellite, or TESS — a super-powerful orbiting telescope designed to hunt for ...

Using ESO's Very Large Telescope (VLT), astronomers have observed a large dark spot in Neptune's atmosphere, with an unexpected smaller bright spot adjacent to it. This is the first time a dark spot ...