A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is ...

Watch this video to find out more about the Earth, planets in our Solar System and other planets far off in outer space. From up here on the International Space Station I get a great view of Earth.

Astronomers have discovered two new exoplanets that are similar to other worlds found in the Milky Way, but unlike any in our ...

A new study presents a compelling new model for the formation of super-Earths and mini-Neptunes -- planets that are 1 to 4 times the size of Earth and among the most common in our galaxy.

The ringed gas giant Saturn has officially replaced Jupiter as the planet in our solar system with the most moons. The International Astronomical Union officially recognized 128 new moons orbiting ...

The James Webb Space Telescope has captured its first direct images of carbon dioxide in a planet outside the solar system in HR 8799, a multiplanet system 130 light-years away that has long been ...

The James Webb Space Telescope has captured its first direct images of carbon dioxide in a planet outside the solar system in HR 8799, a multiplanet system 130 light-years away that has long been ...