Solar Dynamics Observatory Satellite Saw a Lunar Transit
On Nov. 7, our Solar Dynamics Observatory (SDO) satellite saw a lunar transit when the Moon passed between SDO and the Sun. At its peak, the Sun was about 44 percent covered, and the transit lasted just under an hour.
Such lunar transits provide scientific value: The sharp edge of the lunar limb helps researchers measure how light diffracts around the telescope's optics and filter support grids, allowing scientists to better calibrate the instruments for even sharper images.
This image was captured in a wavelength of extreme ultraviolet light, a type of light that is typically invisible to our eyes but is colorized here in gold.