Long ago, a planetary object eight times the mass of Jupiter may have once visited the solar system and altered […] The post ...

"Impact probability is still very low, and the most likely outcome will be a close approaching rock that misses us." ...

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

Mounted on a robotic arm attached to a 33-m long rail, a camera system is brought closer and closer to this scale-model ...

Our Solar System is a carefully balanced celestial dance held together by a virtually perfect balance of gravity and inertia.

Scientists have discovered a new type of planetary collision called “kiss-and-capture,” where Pluto and proto-Charon briefly ...

Study reveals an interstellar object's impact on planetary orbits, reshaping solar system dynamics. Discover how simulations ...

The orbits of Jupiter, Saturn, Uranus and Neptune may have been forever changed by an enormous object that whizzed through ...

University of Arizona researchers have unveiled evidence of romance at the farthest reaches of the solar system: a cosmic ...

A new study, currently under review for publication, suggests that an ancient cosmic visitor might have significantly altered the orbits of our solar system's giant planets. Scientists propose that ...

Marcus Chown’s “A Crack in Everything” is a journey through space and time with the people studying one of the most enigmatic ...

Stargazers will be treated to a rare alignment of seven planets on 28 February when Mercury joins six other planets that are already visible in the night sky. Here's why it matters to scientists.