Original: Juno was discovered on September 1, 1804, by German astronomer Karl L. Harding and named after the mythological figure Juno, the highest Roman goddess.
Simplified: 3 Juno is a main belt asteroid discovered by Karl Ludwig Harding on September 1, 1804. Juno was the third asteroid discovered in the Solar System and is named after Juno, the Roman goddess that is the queen of all gods.