First its rotation slowed between March and May 2017, taking 46 hours to complete a spin where it had once taken only 20 hours. This occurred as the comet neared its closest point to the sun, roughly ...

Some 5 billion years from now, the Sun will expand and become a red giant. And Earth might be just in the way... If humans ...

Explore gravity's essential role in Earth's fast-paced journey through space and its impact on life and science.

We pass through an interesting cycle of change every year: summer's warmth, monsoon rains, autumn's calm, and winter's chill. These seasons determine .

The Sun has shifted into a volatile mood, hurling vast clouds of charged particles into space and putting Earth squarely in the firing line. Forecasters are now watching for signs that a so‑called ...

A new candidate exoplanet appears to almost uncanny similarities to Earth — but may differ in at least one major way.

NOAA warns of likely G1-class geomagnetic storming on Saturday, Feb. 7, through Sunday, Feb. 8, as a coronal mass ejection ...