Release Images

Release No.: 2013-18
For Release: Tuesday, July 9, 2013 - 10:00am

Sun's Loops are Displaying an Optical Illusion

solar coronal loops

This photo of the Sun's edge, taken with the Solar Dynamics Observatory Atmospheric Imaging Assembly, shows coronal loops in a variety of sizes. Although the loops appear to have a constant width, like strands of rope, new work suggests that this is an optical illusion. The loops are actually tapered, wider at the top and narrower at the bottom.

NASA/SDO