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

"There are still many things related to planetary formation and the early evolution of young planetary systems that we don't ...

Finding a world like Earth elsewhere in the universe might mean looking for the right kind of solar system. A new discovery ...

Simpson and Chen ran mathematical models looking at how differently sized Earth-like worlds would have affected the rest of ...

Four planets will be in the parade in January while seven will align in February. Here's how to see the events.

Venus and Saturn are currently in conjunction, meaning the planets appear close together in the night sky from Earth. These ...

The data used to create the image is from a Hubble Space Telescope project to capture and map Jupiter's superstorm system.

Venus, Saturn, Jupiter and Mars will appear to line up and be bright enough to see with the naked eye in the first few hours ...

In Earth's upper atmosphere, a fast-moving band of air called the jet stream blows with winds of more than 275 miles (442 km) ...

Heads up! Four planets are visible in the evening sky this month, and another two planets can be found with a little help.

Tonight, stargazers can see a rare "planet parade" as six planets form a visible arc: Mars, Jupiter, Uranus, Neptune, Saturn, ...