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

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

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

The James Webb Telescope captures the beginning of planetary formation around the young star HOPS-315 for the first time.

Astronomers are tracking strange orbital patterns in the outer Solar System that suggest a massive unseen planet may exist ...

A recent study by Princeton University astronomers suggests the possible existence of a previously undetected planet in our ...

Roughly 4.5 billion years ago, the young solar system was a swirling cloud of gas and dust that formed the first asteroids ...

“Overall, our findings challenge the conventional classification of Uranus and Neptune as ’ice giants’ and underscore the ...

The ice giants remain some of the most interesting places to explore in the solar system. Uranus in particular has drawn a ...

Planet 9 may exist 42 billion miles away, influencing objects in the Kuiper Belt, and could be discovered with modern ...