Momentus, a startup using water-vapor propellant to shuttle satellites from LEO to final destination, raises $25.5M by Peter B. de Selding July 17, 2019 by Peter B. de Selding July 17, 2019 PARIS — Momentus, a U.S.-based startup designing a service to take satellites from their rocket drop-off… Read more 0 FacebookTwitterPinterestWhatsappEmail