Fireworks erupted from the sun on May 12 when an X1.7-class solar flare burbled into view. X-class flares are the most intense categorization; the number behind it describes its strength. An X2 is twice as powerful as an X1, and so on.
The image, captured by NASA’s Solar Dynamics Observatory, is a combination of two pictures taken at two different wavelengths of light. (Related: “Solar Storm Heading Toward Earth.”)
It Speaks For Itself
Massive Solar Flare That Dwarfs The Size Of Our Planet.