Palermo observations expand the solar-system map

The paired discoveries changed astronomers' picture of the recently found planet.

Oberon and Titania were identified together; modern spacecraft later examined both worlds.

Oberon's discovery expanded the family of known moons beyond Saturn.

From Palermo, Piazzi spotted an object between Mars and Jupiter that later became known as Ceres.

Initially understood as a new planet, Ceres was later classed among asteroids and then as a dwarf planet.

The discovery marked the first identification of an object in the asteroid belt.

Galle and d'Arrest found the predicted planet near a position calculated by Le Verrier.

Perturbations in Uranus's orbit had led Le Verrier and independently Adams toward a possible unseen planet.

Comparing sky positions with a chart made the new planet identifiable during the observing session.

The dated observation in Berlin followed calculations developed in France and Britain.