On September 13, the sun put on a show that felt more like a cosmic love note than a scientific event. A giant heart-shaped ...

The partial solar eclipse was visible to over 16 million people when it darkened the sky over the Pacific on Sept. 21-22 ...

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 ...

All signs were pointing to the Sun going into a prolonged phase of low activity,” NASA's Jamie Jasinski said. "The Sun is ...

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