A new startup founded by a trio of SpaceX veterans — who happen to be brothers — aims to build an in-space transportation network, using reusable spacecraft propelled by water harvested from the Moon. Argo Space Corporation, founded by Robert Carlisle, Ryan Carlisle and Kirby Carlisle, is betting that lunar propellant will untether space activities from Earth – and unlock a bustling economy beyond low Earth orbit (LEO). Their plan takes aim at several key limitations of the space economy: First, all existing orbital transport vehicles are focused on LEO, not more demanding orbits like geosynchronous (GEO) or cislunar. Second,...