An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course.

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

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

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 ...

Scientists suggested the enormous object disrupted the orbits of Jupiter, Saturn, Uranus and Neptune, which would explain the peculiarities of these four planets' paths. Prevailing solar system ...

She has covered weird animal behavior, space news and ... orbits of the four outer planets and performed 50,000 simulations of a large object passing through the solar system to determine if ...

To get somewhere in outer space, you can’t exactly drive in a straight line. Orbits are tricky things, and sending a probe to ...

15, 2025 — New observational data and simulation models have confirmed a new type of planet unlike anything ... a clearer picture of how the outer solar system formed and evolved based on ...

It is not often that all the planets in the Solar System other than ours are lined up across the night sky for us to see. The ...