The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Stargazers will be treated to a dazzling six-planet "alignment" this January.

The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

NASA's IMAP mission will delve into the mysteries of the heliosphere, mapping its boundaries and studying solar wind ...

Because planets always appear in a line, the alignment isn't anything out of the norm. What's less common is seeing so many ...

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade ...

Researchers have created an improved traffic light system for predicting geomagnetic storms. They are now testing how well ...

The James Webb Space Telescope has provided groundbreaking insights into a new type of exoplanet, fundamentally different ...