The Short Version
The Artemis II crew did photograph Earth setting behind the Moon's far side on April 6, 2026 — a genuinely notable achievement. However, the unqualified "first-ever Earthset image from space" framing overstates what authoritative sources confirm. NASA's own releases describe the photo as "reminiscent" of Apollo 8's Earthrise rather than declaring it a verified first. The "first-ever" label traces primarily to a secondary media headline, and the claim omits that uncrewed spacecraft or earlier missions may have captured similar imagery.