Last July I described the science from Nasa’s Dawn spacecraft orbiting asteroid Vesta. Even then, Dawn had already left Vesta’s orbit and started a 30-month journey to Ceres. It arrived into Ceres’ orbit this month.Ceres was the first body found in the region between Mars and Jupiter now called the Asteroid Belt. In the late 1700s Titius and Bode had noted a pattern in planet positions that suggested there should be a planet in the gap between Mars and Jupiter; on New Year’s Day of 1801, Fr Giuseppe Piazzi found Ceres from his observatory in Sicily.They expected a planet, so that’s what they called Ceres – though William Herschel, who had just discovered the gas giant Uranus, sniffed that such a tiny dot of light was neither planet nor star (Latin, aste