Recent X8-class solar flare activity reveals critical weaknesses in America's power grid, where geomagnetic currents could destroy transformers and trigger prolonged blackouts.

Explore the solar system from Mercury to Pluto and discover the extraordinary differences in orbital speed, year length, and rotation. Learn how Mercury completes a year in just 88 days, while Neptune ...

Have you been wondering why the northern lights are suddenly all over social media — and in the news? Noticed an unusually ...

Want to feel cosmically insignificant? Wikipedia's "Timeline of the far future" catalogs scientific predictions stretching ...

Earth’s atmosphere is slowly leaking into space, and new research shows some of it reaches the Moon, where it may be ...

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

A powerful solar storm lit skies far beyond the poles, revealing how Earth’s magnetic shield protects the planet during ...

NASA spent roughly a billion dollars to send a car‑sized robot into the Sun’s atmosphere, and to get there it had to ...

Scientists have long opposed polar geoengineering. Some now believe it will be necessary.

Astronomers are closing in on what looks like a rare prize: a world almost the size of Earth, circling a Sun-like star at a ...

Northern lights activity is still raging—here’s our expert’s guide on how to see (really see!) the kaleidoscopic northern ...

A rapidly growing sunspot has fired off at least 18 M-class and three X-class flares in just 24 hours, including an intense X8.3 eruption.