Exoplanet hunters Christopher Watson and Annelies Mortier explain the long search for a 'twin Earth' capable of sustaining ...

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 ...

For all the talk about life across the cosmos, Earth remains the only confirmed example. That single data point makes your ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

The Copernican Principle, named in honor of Nicolaus Copernicus (who proposed the heliocentric model of the universe), states ...

Every planet in our solar system is essentially round. But out in the universe, are there any planets that aren't spherical?

It takes a certain kind of brave (and perhaps foolish) person to join Starfleet and venture into the great unknown, and most of the stories in the Star Trek universe are about an adventure gone wrong.

According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density ...

A star about 600 light-years away is giving astronomers a front-row view to the environments in which rocky planets like Earth form around the most abundant stars in the universe. Called ISO-ChaI 147, ...

Galaxies "blazing with technosignatures" could suggest the existence of a "large number" of "different metasocieties." ...