The Sun Right Now!These images were taken within the last few minutes by the Solar Dynamics Observatory. Each color represents a different filter in front of the telescope, which only allows one particular wavelength of ultraviolet light to be detected. These wavelengths were selected because they correspond to particular ions which are known to exist at different temperatures. Find out more on wikipedia! Wavelengths are listed in the timestamp in angstroms, which are 1/10th of a nanometer.
The images on the left have been radially normalized using my own algorithm to bring out the detail in the upper atmosphere compared with the original images on the right.