Misunderstood “photophoresis” effect could loft metal sheets to exosphere

The news article discusses the "photophoresis" effect, which could potentially be used to loft metal sheets into the exosphere, the uppermost layer of the Earth's atmosphere. Photophoresis is a phenomenon where small particles suspended in a gas can be propelled by the force of light. This effect can generate a small amount of lift without any moving parts. Researchers have discovered that this photophoretic effect could be used to lift thin, lightweight metal sheets into the exosphere, the region above the thermosphere. This could have important applications in space exploration and satellite technology. The article notes that while the concept is promising, the amount of lift generated by photophoresis is still relatively small. Further research and development would be needed to fully harness this effect for practical applications. Overall, the news article highlights a new, unconventional approach to propulsion that could potentially contribute to advancements in space technology and exploration.