Siraj’s Planet Y search started about a year ago when he was trying to find out whether the shape of the Kuiper Belt is flat.

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

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

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

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

On August 24, 2006, our solar system lost a planet. It wasn't by cataclysmic destruction, but rather by the vote of the International Astronomical Union, which declared that Pluto, considered the ...

Astronomers have discovered seeds of rocky planets forming in the gas around the baby sunlike star providing *** peek into the start of our own solar system. The the thing that we've discovered is ...

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

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