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 ...

Narrator: Black holes are some of the most ... Brown noticed that some of them have highly unusual orbits. While most objects in our solar system orbit the same plane, and in the same direction ...

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 ...

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

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

Since the formation of the Solar System, the orbits of the planets have evolved and changed over time. While one of the most prominent ideas in the last few decades is planetary migrations and the ...

Further simulations on flybys into the inner Solar System revealed one of our own planets might be flung out of the ballpark within the following 20 million years or so in just 2 percent of cases. In ...

The Sun is the largest object in the Solar System. The Sun's huge gravitational ... for example, Mercury orbits once every 88 Earth days, but Neptune orbits once every 165 Earth years For a ...

Astronomers have sent artificial satellites (satellites that are manmade) to orbit several Solar System objects, including Jupiter, the asteroid Vesta and Mars. Polar orbits take the satellites ...

"That's when we started thinking about the very precisely measured orbits of objects in the solar system." In principle, a primordial black hole's gravitational pull "could produce wobbles in the ...