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Second SpaceX Starship launch ends with explosion. What happens next?
(www.nationalgeographic.com)
this post was submitted on 18 Nov 2023
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NASA stopped refurbishing their SRBs because it costs more to do so. SpaceX is able to drastically lower it's launch costs because of the immense savings they can realize by a quick turnaround for reuse. That's the difference.
Russia has drastically lower launch costs than SpaceX. Justify it now.
Mind giving your source? I found 2.5k/kg for falcon 9 vs 5k/kg for soyuz. The shtil is as far as I can tell military surplus and is now retired, so it's costs aren't really reflective of long term usage.
https://georgetownsecuritystudiesreview.org/2023/04/20/t-minus-6-seconds-starship-and-humanitys-next-major-step-into-space/
https://marspedia.org/Financial_effort_estimation