W.M. Keck Observatory imagery of star system HR 8799 have been time-lapsed. The system hosts four planets that are more ...

Four exoplanets, each larger than Jupiter, orbit HR8799, represented by the yellow star shape at the center. Image: Gizmodo/Jason Wang/Northwestern University Astronomical phenomena tend to occur over ...

The vast majority of exoplanets that have been discovered are within star systems broadly similar to our solar system: one (or sometimes two or more) stars at the center, with planets orbiting at a ...

A mysterious "rogue" planet has been observed gobbling six billion tons of gas and dust a second—an unprecedented rate that ...

In a solar system far, far away, astronomers have discovered evidence of possible "sibling" planets sharing the same orbit. The researchers detected a cloud of debris in the same orbital path as an ...

CAPE CANAVERAL, Fla. (AP) — Astronomers reported Wednesday the discovery of what could be two planets sharing the same orbit around their star. They said it’s the strongest evidence yet of this ...

Astronomers have found a planet that orbits at an angle of 90 degrees around a rare pair of peculiar stars. This is the first time we have strong evidence for one of these 'polar planets' orbiting a ...

WASHINGTON (Reuters) - They are the most common type of planet observed in our Milky Way galaxy - two to three times the diameter of Earth but smaller than Neptune, and orbiting closer to their stars ...

ITS STAR. THIS ANIMATION DEPICTS THE FINAL MOMENTS OF A GIANT GAS PLANET AS IT IS GOBBLED UP BY A STAR. IT’S SOMETHING SCIENTISTS KNEW HAPPENED BUT HAD NEVER WITNESSED UNTIL NOW. PROBABLY A GIANT ...

Astronomers have identified an enormous "growth spurt" in a so-called rogue planet. Unlike the planets in our solar system, ...

Earth is set to gain another moon by the end of the month — a small asteroid that will be snared by our planet's gravity until the end of the year, scientists say. The mini-moon, an asteroid called ...

In a real-life twist on Star Wars' Tatooine—a harsh desert planet with twin suns and a criminal underbelly—astronomers have found a bizarre new world that orbits two stars at a perfect right angle.