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

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

When astronomers found a large world farther out than Pluto, it became one of the final nails in the coffin of our ninth ...

In October 2020, a van-sized robotic spacecraft briefly touched down on the surface of Bennu, a 525-meter-wide asteroid 320 ...

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

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

A shortcut for New Yorkers to spot some of the planets is to look for them when they are near the moon. On Feb. 1, Venus will ...

Astronomers have made a groundbreaking discovery in the WASP-132 system, finding two new planets that defy previous ...

Jan. 15, 2025 — New observational data and simulation models have confirmed a new type of planet unlike anything found in the Solar System. This provides another piece of the puzzle to ...

An object we thought belonged to the most common category of planet in the galaxy has turned out to be ... because we have nothing directly analogous to them here in our Solar System. Both ...

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

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