The exoplanet HD 20794d swoops in and out of its habitable zone every few hundred days, making for an extreme climate.

Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to ...

YR4, which was recently spotted in the cosmos with a non-zero chance of hitting Earth in the coming years, may have caused some alarm.

Rivers began pumping weathered material into the sea about a billion years after Earth formed, suggesting continents may have gotten an early start.

The gigantic coronal hole is blasting high-speed solar wind toward Earth, potentially igniting vibrant auroras and minor ...

An asteroid first spotted in December has a 1.2% chance of hitting Earth in 2032. Scientists are tracking the space rock to learn more about its size and trajectory.

Moncton, New Brunswick, Canada Imagine driving to the base of a hill, putting your car in neutral, and watching as it appears ...

Using a tracker for motion and mobile controls for exposure transitions, Dorje Angchuk succeeded in capturing a seamless sequence of the Earth's rotation.