New material aims to cut satellite reflections
A group of astrophysicists is addressing the escalating issue of light pollution caused by the proliferation of satellite constellations. They have developed an ultra‑black coating that absorbs the majority of incoming light, potentially reducing the brightness of satellites as seen from the ground.
How the coating works
The coating employs a nanostructured surface designed to capture light across a wide spectral range. Laboratory measurements indicate reflectance values below 0.5 % in the visible band, far lower than those of conventional satellite surfaces.
Possible integration into current and future satellite fleets
Satellite manufacturers could apply the material to upcoming missions to mitigate adverse effects on astronomical observations. Retrofitting existing satellites is also under consideration, though integration challenges remain.
Remaining research challenges
While laboratory results are encouraging, questions about long‑term durability in the space environment and production costs need to be addressed. Additional in‑orbit testing is scheduled to evaluate real‑world performance.
Future outlook
If successfully implemented, an ultra‑black coating could become a key tool for limiting satellite‑induced light pollution and preserving the quality of astronomical data.