An object smaller than Pluto has been discovered orbiting a dying star in what astronomers said Monday resembles a pint-sized version of our solar system. In a separate study, a disk of ...

If star-hopping aliens ever visited our solar system, Saturn is probably the planet they'd remember. The seven giant rings circling its equator make Saturn the most distinct planet orbiting the sun.

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. This article is more than 4 years old. This artist’s ...

Moons circle planets, and planets circle stars. Now, astronomers have learned that planets may also circle celestial bodies almost as small as planets. NASA’s Spitzer Space Telescope has spotted a ...

James O'Donoghue went viral for the first time in December 2018. He was a planetary scientist for NASA at the time, but the federal government had temporarily shut down due to budget disputes in ...

The outer solar system is a vast and mysterious place that could be harboring hidden objects we know almost nothing about — from the elusive Planet Nine and baby black holes to interstellar visitors ...

NASA's SPHEREx and Hubble find mysterious 3I/ATLAS behaving strangely after perihelion. The interstellar visitor's 'mini-jets ...

Saturn's rings, imaged based on radio data from NASA's Cassini spacecraft. Green indicates regions with particles smaller than 5 centimeters; purple is where no particles are that small. The white ...