Overview
- The Federal Communications Commission granted permission for radio operations for Eärendil‑1 on July 9 but limited the approval to a single demonstration and did not approve any larger constellation.
- Eärendil‑1 is a roughly 142‑kilogram satellite that will deploy an 18 by 18 meter aluminized Mylar mirror in a near‑polar low Earth orbit and is planned to launch later in 2026 on a SpaceX Falcon 9.
- Independent modeling by ESO astronomer Olivier Hainaut shows a Reflect‑style fleet could raise diffuse night‑sky brightness by about 20–30% for 5,000 satellites and roughly 200–300% for 50,000, threatening faint‑object astronomy and wide‑field surveys.
- Scientific and environmental groups have petitioned for a programmatic environmental review and warned of risks to wildlife, human sleep cycles, aviation safety from flash glare, and telescope instruments.
- The immediate next step is collecting empirical data from Eärendil‑1 to measure beam control, off‑target scattering, and brightness, and those results will drive further technical, regulatory, and public decisions about any scaled deployment.