BOTHELL, Wash. — From the outside, Portal Space Systems’ headquarters looks like a standard-issue office space in a Bothell ...

Portal’s heat exchanger thruster, known as Flare, fires up during a test in a vacuum chamber. (Portal Space Systems Photo) Bothell, Wash.-based Portal Space Systems says it has successfully tested its ...

Bothell, Wash.-based Portal Space Systems says it has raised $17.5 million in seed funding to accelerate the development of its Supernova space vehicle, which aims to harness the heat of the sun to ...

Portal Space System's Supernova uses sunlight to power a thermal propulsion system that can allow spacecraft to move rapidly between orbits. Credit: Portal Space Systems PARIS — Portal Space Systems ...

Portal Space System's Supernova uses sunlight to power a thermal propulsion system that can allow spacecraft to move rapidly between orbits. Credit: Portal Space Systems WASHINGTON — Portal Space ...

Portal Space Systems, a 4-year-old Bothell startup, wants to make it easier for spacecraft to move between orbits. To make that happen, it had to dust off decades-old research on an unorthodox ...

Portal Space Systems and local officials celebrated the opening of Portal's Bothell facility with a ribbon-cutting Monday. From left: U.S. Rep. Suzan DelBene, Portal co-founder Prashaanth Ravindran, ...

The move will allow Portal to eventually triple its workforce as it moves toward producing one spacecraft per month by 2027. EVERETT — Space start-up Portal Space Systems is building a ...

VIPs cut the ribbon at Portal Space Systems’ HQ in Bothell, Wash. From left: U.S. Rep. Suzan DelBene; Portal co-founders Prashaanth Ravindran, Jeff Thornburg and Ian Vorbach; and Bothell Mayor Mason ...