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National Aeronautics and Space Administration

Goddard Space Flight Center

Sun-Earth Day 2009: Our Sun Yours to Discover.

Sun-Earth Day 2009: Our Sun Yours to Discover

IMAGE GALLERY

STEREO (Behind) - December 16-17, 2007
STEREO (Behind) - December 16-17, 2007

STEREO (Behind) observed in profile the bending and twisting loops above an active region as it rotates to and around the edge of the Sun over two days in EUVI 171 wavelength (Dec. 16-17, 2007).

NASA Fact

On April 8, 1947, the largest sunspot in modern history reached its maximum size of over 330 times Earth's area.