Northrop Grumman unveiled the potential future of space taxis when it released concept artwork of its proposed XS-1 Spaceplane on Tuesday.
The XS-1 is one of three planes in a competition between two other companies hoping to secure a contract from the Defence Advanced Research Products Agency (DARPA), according to the Wall Street Journal. Boeing and Masten Space Systems are the other two companies, which won Phase I initial design con...
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