No one knows why dark side of Venus has a faint glow

On January 9, 1643, the Italian astronomer Giovanni Battista Riccioli pointed his telescope at Venus and noticed a faint glow on the planet's unlit side. Riccioli figured it was an artifact of his glass — the same trick that makes a prism throw rainbows. — Read the rest The post No one knows why dark side of Venus has a faint glow appeared first on Boing Boing.