Multi-wavelength Sun — May 1, 2007

This is a composite Sun in which four images, taken almost at the same time by the STEREO Behind spacecraft on May 1, 2007, were merged together. All of the images were taken in extreme ultraviolet wavelengths by the SECCHI instrument. Images in each wavelength capture solar features at different temperatures (from 60, 000 degrees C. to two million degrees C.) and at different levels above the Sun. Bright areas indicate active regions of intense magnetic activity. The spurt heading off to the right at the two o’clock position is an erupting prominence.

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