Space | Astronomy | Discovery on Instagram: "The clearest image ever captured of Halley's Comet is a composite photograph of its nucleus, taken by the European Space Agency’s Giotto spacecraft during its historic 1986 flyby. This groundbreaking image revealed Halley’s nucleus to be a dark, potato-shaped body about 15 \text{ km} long, showing that the comet's surface is surprisingly black—reflecting only about three percent of sunlight—and features bright jets of dust and gas actively escaping in