For many of us, the idea of a solar system with just eight planets is a fundamental concept in science. However, since Pluto was reclassified as a dwarf planet in 2006, Neptune has stood as the last ...

For the first time in history, we now have real, high-resolution images of Neptune that go beyond artist impressions and telescope visuals. Captured by advanced space telescopes and spacecraft ...

Previous images of far-off planets showed Neptune as being a deep electric blue, while Uranus appeared a sea-foam green. However, new images have revealed that the two planets are, in fact, much ...

An early estimate of Neptune’s mass seemed to suggest that there was still elements of Uranus’ trajectory that demanded some other source of gravity — yet another hidden planet — to explain.

Neptune, long believed to be dark blue, is actually very pale like Uranus, scientists say. They used modern telescopes to re-assess artificially enhanced images taken by NASA's Voyager 2 probe.

Neptune Characteristics . The planet Neptune orbits almost 2.8 billion miles (4.5 billion kilometers) from the Sun and is about 30 times as far from the Sun as the Earth. Like Jupiter, Saturn, and ...

The hunt for Planet X began in 1781 when British astronomer Sir William Herschel was studying stars in the constellation of Taurus and noticed one star seemed slightly fuzzy or nebulous in appearance.

The object, which the researchers have nicknamed Planet Nine, has a mass about 10 times that of Earth and orbits about 20 times farther from the Sun on average than does Neptune (which orbits the ...

The Neptune-sized planet discovered in 2018 isn’t there, but it’s possible a smaller planet—one we haven’t seen yet—still exists around the star 40 Eridani.