All eight of the solar system’s “major” planets appear in this illustration, but the actual number of planetary bodies orbiting our star is far greater.

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

Mnemonics and a catchy rhyme help kids (and adults) remember the planets' order.

When most of us left school there were still 9 planets – but we’ve come a long way since Pluto’s demotion. Here’s what’s next on the space agenda.

What is the Solar System truly like? In this video, we take a closer look at real images captured by NASA and other space agencies, showcasing our planets and the vast beauty of the Milky Way without ...

The discovery of the new planets 100 light years away could be the key to unlocking mysterious of the planets in our own solar system, the researchers said in a new study.

Age data for certain classes of meteorite have made it possible to gain new findings on the origin of small water-rich astronomical bodies in the early solar system. These planetesimals ...

"The Solar Family" is an 11-minute educational film produced by Encyclopedia Britannica Films in 1936. It presents the evolution of the solar system through the lens of the planetesimal hypothesis ...

Astronomers using a pair of planet-hunting satellites discovered a solar system with at least six planets rotating around a star in perfect sync with each other.

Astronomers have discovered a rare in-sync solar system with six planets moving like a grand cosmic orchestra, untouched by outside forces since their birth billions of years ago. The find ...

Is there life on planets other than Earth? For generations, scientists have puzzled over the question, searching for planets that might have the right conditions both inside and outside the Milky ...