There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper’s authors have dubbed ...

What's special about Chiron's rings is that they're still forming; this marks the first time astronomers have ever seen a ...

Astronomers have been actively hunting for a ninth planet in the solar system for almost a decade. But a new study has suggested there may be another hidden world waiting to be found. | Credit: ...

On August 24, 2006, our solar system lost a planet. It wasn't by cataclysmic destruction, but rather by the vote of the International Astronomical Union, which declared that Pluto, considered the ...

Our solar system and galaxy were the first objects of study for what was going on in the universe. Among the various ...

While its star projector leaves a lot to be desired, the Science Can Solar System Planetary Projector is a fantastic educational tool for kids, with its solar system model, complete with talking ...

When you see art of our solar system as the planet orbit the sun, you may notice that Earth's orbit has a tilt. It is not a perfect circle. What's more, Earth is not the only planet that displays such ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...