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 ...

While the giant, icy worlds are similar in many ways, a thinner, more active haze makes Neptune more blue than Uranus. By Jonathan O’Callaghan Roses are red. Neptune’s deep blue. Why, scientists ...

When Voyager 2 flew by Neptune in 1989, it sent back images that were processed to better reveal features like bands and a dark spot. But a new study says it's actually a greener planet.