The solar system lost its ninth planet back when Pluto was demoted to a dwarf planet, but research might indicate that there ...

Pluto's unusual eccentricity and tilt is likely due to its interactions with neighboring Neptune and other giant planets, ...

Astronomers have picked up evidence of an Earth-sized world, distinct from the previously hypothesised Planet Nine and Planet ...

If you were lucky 74,000 years ago, you would have survived the Toba supereruption, one of the largest catastrophic events ...

A partial solar eclipse happens Sunday in parts of the Southern Hemisphere. Saturn will also appear at its brightest, with Earth directly between it and the sun.

Our planet has apparently had a small companion that went undetected for decades. What took so long to find it and why was it hidden?

Is it a full moon tonight? Wondering what is the planet and bright star shining next to the moon? Here's what to know and how to see it.

The news: NASA's Perseverance rover had found potential signs of ancient microbial life on Mars. The discovery represents "the closest we have ever come to discovering life on Mars," NASA acting ...

Leonardo DiCaprio paid tribute to Robert Redford after news of the actor's death at age 89, highlighting the star's ...

It turns out Mars has a solid core just like Earth. A Chinese-led research team reported Wednesday that the heart of Mars, ...