About 4.6 billion years ago, our corner of space was basically just a boring cloud of gas and dust floating […] ...

On Sept. 21-22, a partial solar eclipse will see the moon sweep over the sun's disk, blocking its light over a swathe of the ...

The sun is in its most active phase—solar summer—causing auroras and posing real risks to satellites, GPS, and power systems ...

This skywatching quiz will test your knowledge of how eclipses, when to see them, and what makes each one so spectacular.

Dwarf planet 2023 KQ14, Ammonite, has a stable orbit that challenges the hypothesis of the mysterious Planet Nine.

In this curious film, a pair of friends venture out into the desert to build an accurate to scale model of our solar system.

The Earth stands alone in the solar system as a habitable world, as far as we know. But that doesn’t mean we don’t get visitors, most often in the form of (usually harmless) asteroids. Some even ...