An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Spotting one or two of the planets in our solar system is well worth a good skywatch, but seeing (almost) all of them in a ...

Astronomers have found two planets around two separate stars that are succumbing to their stars' intense heat.

Most moons orbit their planets, but Pluto and Charon are different—they revolve around a point in space between them! 🔄 Why does this happen, and what did NASA’s New Horizons mission reveal about ...

A planet that may support alien life has been discovered less than 20 light-years away from Earth - and it's believed to ...

Hot Jupiters are giant planets initially known to orbit alone close to their star. During their migration towards their star, these planets were thought to accrete or eject any other planets present.

Thirty years after the discovery of the first exoplanet, astronomers have detected more than 7,000 of them in our galaxy. But there are still billions more to be discovered. At the same time, ...

The eight planets in our solar system orbit the sun in roughly the same plane ... It isn’t a perfect line of planets, because their orbits are tilted slightly, but it is fairly close.

Four planets will be in the parade in January, while seven will align in February. Here's how to see the events.

Hot Jupiters are giant planets initially known to orbit alone close to their star. During their migration towards their star, these planets were thought to accrete or eject any other planets present.