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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

Composit of images of  the June 6, 2000 solar flare taken in white ligh tand ultraviolet (TRACE)
Halo Event

This is a classic image of a "halo event," so called because the circular area of the edges of the blast seems to form a kind of halo around the Sun. In the image taken by LASCO C2 on 16 July 2002, one can observe particles blasting out from the Sun in almost all directions. Since this particular event had its origin on the backside of the Sun, the material is streaming away from us here at Earth.

NASA Fact

The largest, single, challenge for astronauts traveling to Mars will be to overcome exposure to solar storms and radiation.