Over the past decade or so, astronomers have speculated about the characteristics of rogue planets in the Milky Way galaxy.

Of the more than 5,000 exoplanets that have been confirmed so far and many more thousands of candidates, most orbit stars the ...

Astronomer Eliza Kempton said that she had waited her "entire career" to peer into an atmosphere from this mysterious class ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

Warmer climates than Earth’s could accelerate life’s development, potentially increasing the number of planets with more ...

WD 1856+534b—a freezing world with a surface temperature of -125 degrees Fahrenheit—exists where planets are normally scoured ...

Spotted thanks to a fleeting light distortion in 2011, a mysterious duo — a tiny star and its hefty companion — has turned ...

Once a year, this planet passes through a celestial beehive typically seen in the night sky during the spring. And it's about ...