Four small, newly discovered worlds are less than six light-years away from Earth, and their discovery reinforces a ...

Astronomers have discovered four planets that are just a fraction of the mass of Earth orbiting Barnard’s Star, which is 6 ...

The two innermost planets, Venus and Mercury, will shine together low in the western sky at sunset on March 10. Here's how to ...

Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy F or centuries our solar ...

Early in our Solar System’s history, bits of icy debris were scattered and then gradually coaxed into a spiral alignment in ...

Inner planets are the four planets closest to the Sun: Mercury, Venus, Earth and Mars. They are collectively characterized by a solid surface and small size relative to the outer gas giants.

MAROON-X was specifically designed to detect tiny exoplanets orbiting red dwarf stars by detecting the minuscule ...

An international team led by researchers in Japan and Europe has discovered a new multi-planet system around a Sun-like star, ...

A weak magnetic field likely attracted matter inward, contributing to the formation of the outer planetary bodies, from ...

After many previous claims and false alarms, astronomers can finally confirm the existence of at least four planets less ...