The sun is at its 11-year maximum. That means another year of eruptions that can endanger satellites, ground flights, and spark stunning auroras.

Tech Insider
purple sun sphere with bumpy bright spots including a giant bright flare in the middle
The sun emits the largest solar flare of this 11-year cycle, as imaged by NASA's Solar Dynamics Observatory on October 3.

NASA/SDO

Earth is bracing for a 'severe' geomagnetic storm and it probably won't be the last for this year

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solar ejections
We're entering solar maximum, a period of heightened solar activity that could cause more auroras, power outages, and communication blackouts.

All About Space Magazine/Getty Images

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