A flare star is a variable star that can undergo unpredictable dramatic increases in brightness for a few minutes.

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Powerful solar flare erupts from hidden sunspot sparking widespread radio blackouts (video)

Our galaxy’s black hole may have made a huge X-ray flare 205 years ago

NASA’s Solar Dynamics Observatory Captures Intense Solar Flare Erupting From Sun

Extreme 'X-Class' Solar Flare Hits Earth, Causing Radio Blackout

'Hole' in the sun and powerful X1.2 solar flare threaten space weather mayhem

Breathtaking X-Class Solar Flare Bursts From the Sun

Sun unleashes powerful X2-class flare (video)

Solar Flare And Explosions Bringing Bright Aurora And Geomagnetic Storms To Millions

Powerful X-class flare spat out a rare 'solar tsunami,' and you can hear it smashing into Earth

Rheumatoid arthritis flare-ups linked to gum disease

Sun Unleashes Most Powerful Solar Flare In Five Years

A Tiny Sun in a Jar Is Shedding Light on Solar Flares

Sun unleashes massive X2-class solar flare during geomagnetic storm watch (video)

Giant X-class solar flare explodes from the sun causing radio interference on Earth

Strong Solar Flare Erupts from Sun

The sun just erupted with a major X-class solar flare. Here's what it looked like on video.

Space claw! Sun shoots powerful flare that knocks out shortwave radio (video)

Astronomers See Flashes on the Sun That Could be a Sign of an Upcoming Flare

New Clues To Predict When and Where the Sun’s Next Flare Might Explode

Explosive X1.9 Class Solar Flare Erupts From the Sun