A NASA Hubble Space Telescope observation program called OPAL (Outer Planet Atmospheres Legacy) obtains long-term baseline observations of Jupiter, Saturn, Uranus, and Neptune in order to understand ...

This artist’s concept depicts the NISAR satellite in orbit over central and Northern California. The spacecraft will survey all of Earth’s land and ice-covered surfaces twice every 12 days.

Skywatchers across the globe are preparing for a spectacular celestial display on Sunday, August 24, when four of the brightest planets, Mercury, Venus, Jupiter and Saturn, will align in the sky ...

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 nearly ...