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

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

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth ...

The workings of our solar system are roughly the same now as they have been for millions of years. Moons circle their planets, the planets circle the sun, the sun’s magnetic fields and sunspots wax ...

A new study led by UNLV scientists sheds light on how planets, including Earth, formed in our galaxy—and why the life and ...

Over 80% of exoplanetary systems with three or more planets exhibit a "peas-in-a-pod" architecture, characterized by similarly sized planets closely spaced and orbiting near their star. A new study ...

One of the most notable properties of the giant planets in our solar system—Jupiter, Saturn, Uranus and Neptune—are the ...

Test your knowledge on our solar system, from the biggest and smallest planets to the behemoth mountain on Mars. When you purchase through links on our site, we may earn an affiliate commission.

CAPE CANAVERAL, Fla. — Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby sun-like star, providing a precious peek into the dawn of our own solar system.

Astronomers have spotted a free-floating ‘rogue’ planet, named Cha 1107-7626, that is going through a massive growth spurt, ...

From lava worlds to gas giants, NASA says the variety of these worlds is staggering—and that signs of a further 8,000 distant ...