An international team led by researchers in Japan and Europe has discovered a new multi-planet system around a Sun-like star, ...

Matt DiNicolantonio is joined by science writer Scott Sutherland to talk about the planets visible in the sky since ancient ...

Could a giant planet between Mars and Jupiter have doomed Earth? A new study suggests that small changes would have been ...

Scientists have identified another possible commonality between Earth and Mars: a solid inner core. Scientists have ...

For a long time, scientists thought the Earth's inner core was a solid ball of metal, sort of like a planet within a planet that sits some 3,000 miles (4,828 kilometers) below the surface.

Here are three myths about the appearance of the planets in the night sky — and how to set your expectations to get the most out of this rare opportunity.

Floating around at the edge of the Solar System are leftovers from its formation. This is the Kuiper Belt, which is composed ...

A new study by Rice University researchers Sho Shibata and Andre Izidoro presents a compelling new model for the formation of ...

Early in our Solar System’s history, bits of icy debris were scattered and then gradually coaxed into a spiral alignment in ...

Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy F or centuries our solar ...