Thursday, August 8, 2013

3MIN News August 8, 2013: ISON, Sprites, 2nd CME at Earth, Hello Coronal Hole


For almost 1 1/2 hours the Moon made an appearance in NASA's Solar Dynamics Observatory's view on August 6, 2013. This has happened before, but such lunar transits are always interesting to see. And they provide scientific value as well. The sharp edge of the lunar limb helps researchers measure how light diffracts around the telescope's optics and filter support grids. This allows the scientists to better calibrate their instruments for even sharper images. The Sun is imaged here in extreme ultraviolet light at 15:25:59 UT.