Rhea Space Activity, a Washington D.C.-based startup, has closed a $6 million funding round. The capital will support the development of its autonomous navigation technology designed for spacecraft operating beyond the reach of Global Positioning System satellites.
The company's system, known as the Astrognostic Navigation System, aims to provide precise location data without external signals. The technology traces its origins to research conducted at NASA's Jet Propulsion Laboratory. It is intended for use in cislunar space—the region between Earth and the Moon—where traditional GPS is unavailable.