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

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 ...

You might want to keep your eyes on the skies for the next couple of months: Six planets will align in January and February.

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

Sky watchers are in for a treat this month as the stars align to give amateurs a shot to see six planets at once.

Six planets are lining up in a row from our Earthly view of the cosmos, in a spectacle that'll be visible in January through ...

Mars will be making its closest approach to Earth in two years, and thus, the mighty red planet, named for the god of war ...

This alignment will give people an opportunity to see multiple planets at once, but the difference will not necessarily be ...

Skywatchers: A six-planet alignment peaks this week as Mars, Jupiter, Uranus, Neptune, Venus, and Saturn come together for ...

A new study, currently under review for publication, suggests that an ancient cosmic visitor might have significantly altered the orbits of our solar system's giant planets. Scientists propose that ...

A new study suggests that a planet-sized object may have passed through the solar system billions of years ago.

"A parade of planets, also sometimes referred to as a planetary alignment, is when several planets in our solar system appear ...