NASA's Solar Dynamics Observatory,
which observes the sun 24 hours a day, captures this image of an
X-class solar flare at 7:42 a.m. ET Tuesday, June 10. X-class flares are
the most powerful. Check out more images of recent solar flares and
related activity:
The short-lived
explosions were expected to disrupt high-frequency radio communications
on Earth, although NASA scientists said they pose no threat to humans.
Even with all its power, the sun doesn't have enough energy to hurl a fireball 93 million miles at the Earth.
Solar flares are powerful
bursts of radiation that send gases, plasma and other matter into the
solar system. Harmful radiation from a flare cannot pass through Earth's
atmosphere to affect humans, but when intense enough, the explosions
can disturb GPS and communications signals, NASA said.
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