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 ...

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade ...

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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NASA’s Goldstone Solar System Radar is closely tracking asteroid 2024 PT5 during its nearest approach to Earth, a distance ...

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

Have you read on social media about the “once in 396 billion years” planetary alignment happening on Jan. 25? Guess what? Social media is not reliable. Here’s what’s really going on — and why you ...