A New Blue Marble
The Obama White House

Thank you, Captain Kelly, for these beautiful images. I have a question: in the late Sixties, author Stewart Brand issued a public call for images of the Whole Earth. In 1968, a photo of the entire planet was taken, and Brand put it on the cover of the first edition of his “Whole Earth Catalog.”
Yet I find multiple sources saying, as you do, that the 1972 image was the first photo of the whole Earth. The National Air & Space Museum has an article up that mention Brand’s quest and still also says the ’72 photo was first. Why the discrepancy? Is there a technicality that disqualifies the ’68 photo?