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

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

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

Beyond Neptune lies the Kuiper Belt, a vast expanse of icy bodies that may hold clues to the solar system’s formation. These ...

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...

HD 20794 d completes its orbit just shy of two Earth years, placing it well within reach of conditions that might harbor life ...

Purdue professor along with a team of scientists analyze asteroid samples from NASA’s OSIRIS-REx mission to give a better understanding of the past.

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 ...

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

Michigan State University and NASA researchers discover seven dark comets that reveal new solar system secrets.

Two new studies show a briny, carbon-rich environment on the parent body of the Bennu asteroid was suitable for assembling ...