Portal Space Systems raises $17.5M for orbital spacecraft powered by solar heating
An artist's conception shows the Supernova spacecraft in orbit. (Portal Space Systems Illustration) Bothell, Wash.-based ...
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Portal Space Systems opens its doors for a sneak preview of solar propulsion system
BOTHELL, Wash. — From the outside, Portal Space Systems’ headquarters looks like a standard-issue office space in a Bothell business park. But inside, the Portal team is working to harness the ...