Artemis II crew flew fast, earned new patch: Astronauts' Mach 39 emblem

"It is actually challenging how you measure [Mach] from space." https://arstechnica.com/space/2026/06/artemis-ii-crew-flew-fast-earned-new-patch-astronauts-mach-39-emblem/?utm_brand=arstechnica&utm_social-type=owned&utm_source=mastodon&utm_medium=social