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 ...

From the cratered companion that lights Earth's night sky to the hundreds of icy worlds circling the Solar System's giant ...

A groundbreaking super-puff planet discovery has revealed two giant exoplanets with densities below cotton candy, changing how scientists understand alien worlds. These Jupiter-sized planets show that ...

Key science: Stellar dynamics, N-body simulations, planetary orbital stability, and galactic gravitational potentials.

What can rocky planets orbiting in the outer parts of a solar system teach scientists about planetary formation and evolution? This is what a recent study published in Science hopes to address as a ...

What can the galactic habitable zone (GHZ), galactic regions where complex life is hypothesized to be able to evolve, teach scientists about finding the correct stars that could have habitable planets ...

The Solar System is far more diverse in size than it appears from Earth. From tiny rocky worlds to massive gas giants, each ...

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 ...