On Oct. 3, the sun released the most powerful solar flare this solar cycle, a colossal X9.05 eruption — and it's heading for Earth.

The X7.1-category blast caused a shortwave radio blackout over Hawaii and hurled a faint halo CME into space. "NOAA ...

A high-speed stream of solar wind from a large coronal hole is expected to cause moderate geomagnetic storms over the next ...

A strong geomagnetic storm is expected to hit Earth this week after a massive solar flare erupted from the sun, potentially ...

NASA has confirmed that the huge flare has also led to a massive expulsion of solar plasma and high energy particles (a ...

A solar flare erupted from a sunspot Tuesday night and is now considered the second strongest of the current solar cycle.

NASA's Interface Region Imaging Spectrograph (IRIS) mission captured an X1.1-class solar flare. See time-lapse footage of the ...

An X7.1 solar flare erupted from the surface of the sun on Tuesday, and the northern lights may be visible across parts of ...

Earth is bracing for an extreme geomagnetic storm this week after the sun blasted an X-class solar flare toward our planet.

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The X7.1-class flare is the second-most powerful this solar cycle—and an associated eruption could cause aurora in the coming days.

Years ago, astronomy professors started noticing something that troubled them: Many of their students didn't understand ...