Over the last ten years, OPAL has observed Uranus' northern hemisphere, which has faced the inner solar system for the ...

The Hubble Space Telescope has been imaging the outer planets of our solar system for a decade, learning about their strange ...

Discover what the Hubble Outer Planet Atmospheres Legacy program has learned about the outer planets, including Jupiter, ...

Encountering Neptune in 1989, NASA's Voyager mission completed humankind's first close-up exploration of the four giant outer planets of our solar system. Collectively, since their launch in 1977 ...

This is a montage of Hubble Space Telescope views of our solar system's four giant outer planets: Jupiter, Saturn, Uranus, and Neptune, each shown in enhanced color. The images were taken over ...

Astronomers have discovered an unusual exoplanet with a long "tail" of gas trailing behind it. As NASA details in a recent ...

They never accreted into planets, and serve as pristine time ... offer for the first time a clearer picture of how the outer solar system formed and evolved based on analyses of trans-Neptunian ...