space-based solar power

Philip Johnston explains why Starcloud is building orbital data centers: falling launch costs could make abundant solar energy in space useful for meeting growing compute demand. He describes the company’s pivot from beaming solar power to Earth, its first satellite experiments with NVIDIA GPUs, and the engineering work needed to manage heat and radiation. He outlines a product path from early government and military compute contracts toward large orbital systems, while discussing launch economics, fundraising, and hiring. His advice to aspiring space founders is to book an early launch and build a strong technical founding team.

StarCloud is building orbital data centers to provide satellite computing first, with a longer-term goal of moving much of data-center computing off Earth. The talk explains how constant sunlight and radiating heat into space could reduce dependence on terrestrial power grids and fresh water, while describing the engineering challenges of shielding and cooling GPUs in orbit. Co-founder Philip Johnston traces the idea from space-based solar to orbital computing, and describes the team’s backgrounds, YC experience, and rapid satellite development. StarCloud’s first satellite launched with an NVIDIA H100 GPU; the company plans to test training and inference in orbit and describes a more capable Blackwell-equipped satellite as its next launch.