The ringed gas giant Saturn has officially replaced Jupiter as the planet in our solar system with the most moons. The ...

New research suggests that a binary pair of Kuiper Belt objects, known as the Altjira system, is actually made up of three ...

A newly identified Kuiper Belt trio, possibly only the second of its kind, could provide strong evidence that these distant ...

The farthest spacecraft from Earth are shutting off instruments in interstellar space, but their mission in interstellar ...

The puzzle of predicting how three gravitationally bound bodies move in space has challenged mathematicians for centuries, and has most recently been popularized in the novel and television show '3 ...

The triple star system is sending comets, asteroids and meteors our way, and the number of interstellar objects entering the solar system will rise.

A seven-luminaries-deep parade of planets will line up and light up the night sky this week, folks. Just after sunset on Feb.

This phenomenon, known as a "planet parade," will feature Mercury, Venus, Mars, Jupiter, Saturn, Uranus and Neptune all ...