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Well, for the most egregious example ...

Cost per SLS launch:                      US$2 to 2.5 Billion

Cost per Titan IV launch                 US $432 million (unknown year)

Cost for Delta IV Heavy launch      up to US $430 million

Cost per Falcon Heavy Launch:      US$97 million (2022) Expendable: US$150 million (2017)

Cost per Falcon 9 Launch               US$79 million (2022)


This is just from several quick Google searches. Take these as ROM cost only. YMMV. Most precise figures will require a determination as to how may bean-counters can conduct audits on the the head of a of a pin.


On the other side of the scale, "FY19 Budget for keeping track of and operation Voyagers 1 and 2, as well as processing and disseminating the science data they continue to return was $5.8 million. This has been relatively steady (4.5–6 million a year) for the last 15 years and NASA expects the cost to remain around $5 million/year though 2025". (Quora) I will assume that en-route mission support costs for a current mission to Saturn would be twice to four times this amount (WAG).


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