Un philosophe donnant une conférence sur l'orrery

In 1766 England was in the middle of its scientific craze, and a good astronomy lecture was a night out. Wright painted exactly that. A lecturer in a red gown leans over an orrery, a clockwork model of the solar system, explaining how the planets circle the sun. The clever part is the light. Wright put a single lamp where the sun should be, hidden behind the boy in the foreground, so the whole scene is lit as if by the sun itself. Faces glow out of the dark, and two children lean in, caught in the moment of understanding. This was a quietly radical thing to do. Painters of the time gave that kind of reverent, candle-lit treatment to religious scenes or to Roman heroes. Wright handed it to a room of ordinary people learning how the heavens work.