leading up to a $45 million boost orchestrated through the SpaceWERX STRATFI program. U.S. Rep. Suzan DelBene and Bothell Mayor Mason Thompson check out a subscale test model of Portal Space ...

(Portal Space Systems Illustration ... When an ammonia-based propellant passes through the heat exchanger, it rapidly builds up pressure and produces thrust. Thornburg said Supernova can ...

Credit: Portal Space Systems WASHINGTON — Portal Space Systems has raised $17.5 million in a seed round that will allow the venture to develop and demonstrate a highly maneuverable spacecraft.