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

When you look at the solar system, you might notice that the planets' orbits are tilted, and oddities in the protoplanetary ...

Astronomers have discovered a distant dwarf planet orbiting beyond Neptune — a frozen world so far from the Sun that it challenges everything we know about how the solar system formed.

Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its ...

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

About 4. 6 billion years ago, the Solar System formed from a cloud of dust and gas collapsing in on itself due to gravity.

The eyes of every astronomer widened this year when an interstellar traveler was discovered in our solar system. Despite some ...

The rings of Saturn are among the wonders of our solar system, with a diameter of roughly 175,000 miles (280,000 kilometers) ...

Interstellar visitor 3I/ATLAS has been constantly changing as it makes its way through our solar system. That's to be ...

A new peer-reviewed study finds that early planet formations were assembled from fragments of earlier bodies within the Solar System.

A mysterious space object named 2023 KQ14, nicknamed “Ammonite,” challenges theories about the mysterious and possible Planet ...

Analyses of its emissions using NASA’s Neil Gehrels Swift Observatory indicate that the interstellar comet probably has a ...