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 ...

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

A planet-sized visitor possibly visited the solar system billions of years ago and permanently changed the cosmic neighbourhood by warping the orbital path of four outer planets of the system, a ...

The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

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

Scientists studying samples that NASA collected from the asteroid Bennu found a wide assortment of organic molecules that ...

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...

When you first learned about the Solar System, you probably saw diagrams that made it look orderly, with planets arranged in ...

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 ...