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.

Six planets are lining up in a row from our Earthly view of the cosmos, in a spectacle that'll be visible in January through ...

The ISS's orbit is slowly decaying. While it might seem a permanent fixture in the sky, the orbiting space laboratory is only ...

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 ...

"A parade of planets, also sometimes referred to as a planetary alignment, is when several planets in our solar system appear ...

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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 ...