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

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Long ago, a planetary object eight times the mass of Jupiter may have once visited the solar system and altered […] The post ...

A new study in astrophysics has found why some planets’ paths have certain peculiar features. The formation of the solar ...

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 ...

A new study claims it is possible an "alien visitor" could have warped our solar system during its earliest years.

ISTOCK / GETTY IMAGES PLUS The planets in our solar system orbit the sun in roughly the same ... This alignment causes the apparent paths of the other planets to trace a consistent arc across ...

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

The OSIRIS-REx mission returned to the sample to Earth in September of 2023, and these studies show that it contains amino ...

Prevailing solar system formation theories indicate that these planets should have at least started out following perfectly circular and share the same orbit. But today, their paths are slightly ...

The interlopers in these near matches dove straight into the solar system, traveling way past Uranus' orbit, with some even grazing Mercury's path. And they were relatively tiny, ranging from two ...