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

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 ...

Beyond Neptune lies the Kuiper Belt, a vast expanse of icy bodies that may hold clues to the solar system’s formation. These ...

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

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

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 ...

Astronomers have made a groundbreaking discovery in the WASP-132 system, finding two new planets that defy previous ...

Tonight and throughout January, stargazers can see a planetary alignment in the night sky or what some are calling a ...

Further simulations on flybys into the inner Solar System revealed one of our own planets might be flung out of the ballpark ...

Here’s how it works. A planet-size object that possibly once visited the solar system may have permanently changed our cosmic neighborhood by warping the orbits of the four outer planets ...