Everyone's favorite dwarf planet, Pluto, was discovered just 95 years ago. Here's the story of how the once-ninth planet was ...

For the better part of a century, we believed there were nine planets in our solar system, with Pluto being the farthest from the sun. Since the discovery of more Pluto-sized dwarf planets, that ...

The relative quantities of volatile gases like methane and ethane can reveal key details about distant Kuiper Belt objects.

Scientists estimate there are ~1 septillion (1 followed by 24 zeros) planets in the observable universe. This figure is based ...

The findings provide strong evidence that four giant exoplanets 130 light-years from Earth formed much like Jupiter and ...

Astrology deciphers the unique energies and influences of planets on human lives. Luminaries like the Sun and Moon shape core ...

The gas giants outside our solar system are not capable of hosting extraterrestrial life, but do offer clues in a lingering ...

Earth has a nearly circular orbit, but some planets outside our solar system, called exoplanets, have very elliptical orbits.

A new classification scheme may help us better understand planet formation — including the history of our own family of worlds.

The heliosphere, a cosmic bubble formed by the Sun, protects our solar system from interstellar threats and influences life's ...