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

Harvard researcher Avi Loeb says comet 3I/ATLAS weighs 33 billion tons and spans 3.1 miles, making it far larger than ...

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 ...

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

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

The interstellar object hurtling toward the inner solar system, where Earth is located, is much larger than previously ...

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

Wave-particle interactions across the solar system can have a wide range of effects though they are caused by the same set of ...