What will occur on the Earth when a sunspot with the size of approximately 6.5 Earths begins to release successive X-class ...

Sun Region 4366 has produced dozens of solar flares since Jan. 30, "putting on quite a show," says Slooh President and ...

The four X-class solar flares in about a day is a rate that makes even a typical sunspot pass a near-Earth space stress test ...

The sun on June 30. Magnetic fluctuations on the sun's surface can be seen here. Sunspots are cooler than other parts of the sun's surface because they form in areas where our star's magnetic fields ...

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

The Sun is putting on quite a show right now. Earth-facing sunspot region 4366 has been erupting almost non-stop since it emerged on January 30, producing six X-class solar flares so far.

This cluster of sunspots has produced more than 60 solar flares, including several that could spark colorful auroras across ...

The sun’s active sunspots—which are the cause of recent Northern Lights sightings in the U.S.—may erupt a few solar flares this weekend, and scientists recommend using solar eclipse glasses to see how ...

NASA has detected a large grouping of sunspots — dark patches on the sun — known as AR3576, which have increased in size in the last month and could be a risk for strong solar flares. Solar flares, ...

A cluster of sunspots 15 times the size of Earth rolled into view. These have been fizzing with activity and could send solar weather toward Earth as early as Saturday. Space weather is mostly ...

Sunspots — those marks that aren't freckles or moles — are signs you’ve spent your fair share of time soaking up the sun. “Sunspots are your skin’s response to daily exposure to ultraviolet rays,” ...