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 ...

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.

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

Astronomers observe for the first time the actual motion of spirals in a protoplanetary disk, revealing gravitational ...

Even astronomers who study peculiar outer space objects have their favorites. Here are some interstellar bodies that have won ...

We all need some space sometimes—but it's harder to find than you might think. How far into our universe do we have to go to ...

This article was originally featured on The Conversation. Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky A cloud of ...

Students for the Exploration and Development of Space (SEDS) is more than just a club for students who are passionate about ...

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

NASA officials respond to reports claiming an exoplanet-hunting balloon crashed in Texas, with the project’s lead scientist explaining what really happened.