Using the James Webb Space Telescope, astronomers have discovered an example of a new class of exoplanet, and it smells like ...

Mercury, Venus, and Mars sit within the same general neighborhood as Earth, yet each has followed a radically different path.

In a groundbreaking discovery, astronomers have confirmed the approach of a “wandering planet” into our solar system. This celestial event has sparked a flurry of scientific interest and speculation.

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory about the possibility of a giant ninth planet. The dwarf planet's existence ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Astronomers have found a distant celestial body — ...

This world is part of a planetary system with four other planets, including a super-Venus and a possibly habitable ...

A University of Arizona-led team discovered a growing planet, WISPIT 2b, forming inside a disk gap around a young star. The finding confirms theories that protoplanets carve out gaps in disks of gas ...

Planet Y is the latest in a series of hypothetical solar system planets that scientists have proposed in recent years, all with slightly different characteristics but collectively believed to be ...