New observational data from the James Webb Space Telescope and simulation models have confirmed a new type of planet unlike ...

as they may be similar in size to Earth if a planet is very large. It's not a trivial question to ask if moons in these chaotic systems of 2 stars and a planet would be stable, so we were eager to ...

The Red Planet reaches its best position all year this week on January 15. Here’s how and when to get out and see it.

Astronomy has unveiled some of the most impressive results: two Earth-sized Exoplanets orbiting a very nearby star called HD ...

and the second half draws a line between planets and stars. By this definition, the Earth would be a planet — and so would the moon and Pluto. The IAU definition is the most widely accepted one ...

When it comes to celestial events, 2025 is getting off to a star-packed — or mostly planet- and comet-studded — start, including an upcoming welcome to a first-time visitor to our solar system.