APOD 4.5

25 ultraviolet images later, this photo of our vary own sun was produced courtesy of the Solar Dynamics Observatory. In this particular wavelength of the extreme ultraviolet--known as 171 angstroms--the highly ionized iron in the sun's corona can be pinpointed, capturing the distinct characteristic of 600 000 Kelvin temperatures. While the sunspots are not as easily seen in this image as they are in most visible light spectrum photographs, the nature of the sun's unequal magnetic field can be well noted, especially in the band around the solar equator.