
thumb|right|The night side of the Moon, illuminated by earthshine, becomes visible next to the narrow crescent (11 percent, age of the Moon = 3.3 days) with ash-grey moonlight.
thumb|right|The night side of the Moon, illuminated by earthshine, becomes visible next to the narrow crescent (11 percent, age of the Moon = 3.3 days) with ash-grey moonlight.
Earthlight is the diffuse reflection of sunlight reflected from Earth's surface and clouds. Earthshine (an example of planetshine) causes the Moon's ashen light, the dim illumination of the otherwise unilluminated portion of the Moon by this indirect sunlight.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).