Mars' southern hemisphere absorbs a lot of the sun's energy during the Red Planet's spring, and that may be causing Mars' ...

Why does its southern hemisphere rise significantly above the smoother northern plains? A groundbreaking study using seismic ...

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

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

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

Simpson and Chen ran mathematical models looking at how differently sized Earth-like worlds would have affected the rest of ...

Planetary alignments aren't rare, but they can be when they involve six of the eight planets in our solar system.

Tonight and throughout January, stargazers can see a planetary alignment in the night sky or what some are calling a ...

A new study claims it is possible an "alien visitor" could have warped our solar system during its earliest years.

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

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

2025 is starting off with a bang for skygazers, with a planet parade now visible in the night sky. A planet parade is when ...