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 ...

"Chemical rockets that we use today, even with the extra speed boost from flying by planets, or from swinging by the sun for ...

Scientists suggest an interstellar visitor may have altered planetary orbits in our Solar System, reshaping trajectories of ...

Planets in our solar system orbit the Sun in different orbits in three-dimensional space. Scientists have claimed that an interstellar visitor, much larger than any celestial body in our solar ...

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

While an antimatter engine is very far off, researching it could yield other discoveries as well.

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