Nasa Used Art to Shape Our Vision of the Future

Anyway, this text is clear: "Alternately known as Triana, Goresat, or by its current name, DSCOVR (Deep Space Climate Observatory), it’s the first earth science mission distant enough from our planet to capture its entire sunlit surface in a single photograph (only one such photograph, shot from Apollo 17, was previously in existence). And it does so multiple times a day, every day—with the results posted online by NASA, ready for public consumption within 12 to 36 hours."

We can get pedantic about this, but the message of the second article is that the occasion when the Blue Marble was taken was a rare opportunity, with the consequence that there wasn't really a choice or supply of up-to-date full-disc images until DSCOVR.

(https://www.artsy.net/article/artsy-editorial-one-photograph...)

None of us here actually knows everything about these complex space exploration missions, let alone participated in them. It looks pretty silly and pretentious to try playing "know it all" about an endeavour that is way above our pay grade.