It seems 2025 will have a strong start, too, with a planet parade just a few weeks into the new year. A planet parade is when ...

Test your knowledge on our solar system, from the biggest and smallest planets to the behemoth mountain on Mars.

If you’d like to see all the planets of our solar system, this is a good week to do so. Step outside at dusk and you’ll notice the most obvious of planets ...

If Brown’s hidden world is real, Rubin will almost certainly find it or strong indirect evidence that it exists. “In the ...

An exoplanet in the Trappist star system — a multi-planet star system similar to the solar system and just 39 light-years ...

It's possible for our solar system to capture a rogue planet and give it a home as it hurtles through the galaxy, according ...

But the formation process of multi-planet systems, like our own Solar System, is still poorly understood. The best example object to study multi-planet system formation is a young star known as ...

The solar system is approximately 4.6 billion years old. Astronomers believe that roughly 100 million years into its existence, the planets first began to form in a rotating, flat cloud of gas ...