Northern lights occur when a solar flare interacts with Earth's atmosphere.

The sun is experiencing a violent solar storm, releasing one of the strongest solar flares seen in the past 30 years ...

Many objects in space rotate. Earth completes a spin in roughly 24 hours, while Venus takes a whopping 243 Earth days. The ...

Time feels like the most basic feature of reality. Seconds tick, days pass and everything from planetary motion to human memory seems to unfold along a single, irreversible direction. We are born and ...

Using data collected by NASA's Parker Solar Probe during its closest approach to the sun, a University of Arizona-led ...

Tree rings hold clues about ancient solar storms. New research shows tree growth and carbon storage can shift those signals across years.