A Triumvirate: Three Coronal Holes
Summary
Three substantial coronal holes rotated across the face of the Sun the week of Sept. 8-10, 2015 as seen by NASA Solar Dynamics Observatory. Coronal holes are areas where the Sun magnetic field is open and a source of streaming solar wind. They appear darker in extreme ultraviolet light because there is less material in the hole areas being imaged in this specific wavelength of light. It is a little unusual to have three coronal holes at the same time, but neither is it a rare occurrence. http://photojournal.jpl.nasa.gov/catalog/PIA19950
NASA/GSFC/Solar Dynamics Observatory
Date
10/09/2015
Location
California Institute of Technology - Jet Propulsion Laboratory, 34.20139, -118.17341
Source
NASA
Copyright info
Public Domain Dedication (CC0)