Inspired by Hank Green’s fun new timeline of photos from the Artemis II mission, I wrote up an answer to a question that's more pertinent these days than it may seem: Why are the Artemis II photos on Flickr? https://anildash.com/2026/04/30/artemis-photos-flickr/
@anildash Thanks for writing this. NASA has (or has had in the past) over thirty Flickr accounts for various things. They're not all active (though some are) but it's a huge number of public domain or CC-licensed images. If you start from this query you can see some of them up top (further down, just people using the name or talking about something else altogether).