Will be surprised if #Artemis1 launch happens today. If or when today's countdown reaches T-10 mins they'll pause for half an hour and, if everything looks OK and they can fit it within the 2-hour window (opening 13:33 UK time), set a specific launch time.

https://twitter.com/KeithMansfield/status/1563934161416626176

Apparently there's a problem with one of the four main RS-25 engines and a crack has developed between two of the tanks. blogs.nasa.gov/artemis/2022/0… I'd suggest this makes today's #Artemis1 #SLS launch highly unlikely. #Artemis

Many of my space friends will hate this 🧵, but I very much share @sciguyspace’s misgivings about #SLS & would go further. I understand his argument that we had to squander $50bn on SLS+ for people to realize it’s not the future of crewed spaceflight & we need to transition… 1/5

https://twitter.com/SciGuySpace/status/1562054739877134336

to sustainable, reusable, far less expensive and more capable rockets such as #Starship. But the issue is we could still be wasting billions on these launches for years to come, and slowing down Moonbase progress. I do think #Artemis as an idea is too far along not to happen. 2/5