July 12, 2010: Anamorphic Art

[xoxoxoBruce]

That seems like a viable way to measure the distortion of any spectrum coming through our atmosphere. But it's a long way from the source of most of the things their looking at, to our thin candy shell. I guess they know enough about the properties of the whole spectrum, including how they travel, so correcting for our atmosphere they can determine if anything else along the path is affecting it.