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Old 08-13-2019, 03:51 AM   #5
Rhianne
Nearly done.
 
Join Date: Jul 2007
Location: Teetering on the edge.
Posts: 1,119
"Radio-isotope propellant source" is the quote they're using here.

This from the BBC yesterday: https://www.bbc.co.uk/news/world-europe-49319160
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