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

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

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

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

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

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

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

Images captured by NASA's Solar Dynamics Observatory have revealed that "coronal loops" give off subtle flashes of ...

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – here’s how to spot the celestial show ...

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

Stargazers will be treated to a dazzling six-planet "alignment" this January.