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 ...

It’s textbook astronomy. Planets form little by little, as material slowly congeals within the disk of gas, dust, and ice known to swaddle young stars. First, gravity gathers together bits of dust, ...

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.

An ancient Mayan Text called the Dresden Codex contains detailed recordings of the phases of Venus in its Venus Table, on pages 46 to 50. Data in the Venus Table may have been gathered by astronomers ...

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 ...