National Aeronautics and Space Administration
Goddard Space Flight Center
Sun-Earth Day 2010: Magnetic Storms
IMAGE GALLERY
- SOHO MDI Sunspot size winner
Large coronal mass ejection seen in LASCO C3 on Nov. 26, 2001.
NASA Fact
The August 4, 1972 solar flare was so powerful that, by some estimates, a spacesuited astronaut would have received a lethal does of radiation.