Further simulations on flybys into the inner Solar System revealed one of our own planets might be flung out of the ballpark ...

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

The research, yet to be peer-reviewed, sheds light on what could have changed the orbits of several planets in the solar ...

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

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 ...

The eight major planets of our Solar System orbit the Sun in the same flat plane ... in our night sky together along the ecliptic, the path traced by the Sun. Mercury, Venus, Mars, Jupiter ...

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The discovery of two new planets beyond our solar system by a team of astronomers from The University of Warwick and the ...

In the distant space out beyond the orbit of Jupiter lurks a strange object. Its name is Chiron, a type of outer Solar System body known as a centaur. But even among its fellow centaurs, Chiron is ...

"This is, incidentally, why we sometimes observe planets appearing to approach closely to each other on the sky, as we view ...

From the total lunar eclipse in March to three epic supermoons this fall, these are the best celestial events of 2025 that are worth traveling for (plus one to look forward to in 2026!).