Neptune has long been depicted as a deeper, darker blue than its fellow ice giant Uranus, but a new study shows that both are a similar shade of... Don't look so blue, Neptune: Now astronomers know ...

Telescopes of all varieties gather information from the electromagnetic spectrum to make their images. Some of that light is visible, the stuff we can see with our eyes, and some of it isn’t. X-rays, ...

In 1989, Voyager 2 became the first and only spacecraft to ever fly by Neptune, and images from that mission famously show a planet that's a deep azure color. But in reality, Neptune is far more of a ...

In pictures of the farthest planets from the sun, Uranus looks like a pale-green orb, while Neptune usually looks much bluer. A new analysis revealed their true colors. Here's NPR's Nell ...