The Sun Through Different Eyes
The sun is a mysterious celestial body—it is part of all our lives each day yet we really don’t know what it looks like, save for the paltry information our eyes can divine in the visible part of the electromagnetic spectrum. Yet it broadcasts its fusion-generated energy in a diversity of wavelengths. Each one shows the sun through a different set of eyes, like the example above, when a telescope recorded on Dec. 12 a huge coronal hole in the star’s northern hemisphere that was most apparent in the extreme ultraviolet part of the spectrum.
According to NASA’s Solar Dynamics Observatory (SDO), “The dark region is where the magnetic field of the Sun is more open, emitting streams of high-speed solar wind. Over the next few days, this solar wind is likely to impact Earth’s magnetosphere and possibly cause displays of aurora.”
SDO’s multiple-wavelength data also went in to produce the video below, which shows the sun in a number of bands that are normally invisible to people.