Astronomers are closing in on one of the most tantalizing possibilities in planetary science, evidence that a previously unknown world may be lurking in the outer reaches of the solar system. The ...
New research suggests the moons of Jupiter and Uranus may hint that our planetary neighborhood once had a third ice giant.
Scientists have discovered a bizarre planetary system where a rocky world orbits farther out than giant gas planets, defying ...
The newborn planetary system appears to be emerging 1,300 light-years away around a baby star known as HOPS-315. Planet-forming materials were first identified using NASA's James Webb Space Telescope.