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
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
Yes #WeAreGoing so I’d be fine if #SLS blows up en route to orbit so long as no one’s hurt. That way everyone would have to accept it’d be too costly and take too long to build another SLS just to test, and they should divert the money elsewhere for our return to the #Moon. 3/5
Though Biden and his man Bill Nelson are “old space” so it might take to the end of the current administration before the necessary change happens. I feel for everyone who’s worked on #SLS and #Artemis1, but they may well know in their hearts it’s a dead end and such a waste. 4/5
How can we continue to counter arguments from some quarters about “wasting money in space” when that’s precisely what this #OrangeRocket was built to do? (It's designed to be mind-bogglingly expensive, only to be thrown away after one flight so we have to build another one.) 5/5
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.
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
Even if (as currently seems likely) today's #Artemis1 launch is scrubbed because of the issues, #NASA engineers will proceed as far as they can with the countdown as this is a test flight and they will want to test as many of the #SLS systems as possible. #Artemis