The star HIP 67522 with a flare erupting toward an orbiting planet, HIP 67522 b, is depicted in this illustration released by the European Space Agency on July 2, 2025. A second planet, HIP 67522 ...

WASHINGTON — Frigid and far-flung Neptune, our solar system’s outermost planet, is adding to its reputation as an enigmatic world, with astronomers puzzled by a surprising drop in its ...

Also prominent in the new image are Neptune's rings, which have not been directly observed since Voyager 2 flew by the planet in 1989. It is difficult to observe these rings from afar because they ...