quietly shaping the orbits of icy objects at the edge of our solar system. Now, a new generation of telescopes may be about to prove it. The Vera C. Rubin Observatory, perched atop a remote ...

For instance, Neptune migrated outward, switching places with Uranus, and pushed a lot of the small, icy bodies into the ...

The James Webb Space Telescope has captured its first direct images of carbon dioxide in a planet outside the solar system in HR 8799, a multiplanet system 130 light-years away that has long been a ...