Christmas scene painted by Giotto in the Capella degli Scrovegni, Padova, Italy.
It was the first time that the 'Star of Bethlehem' was represented as a comet. ESA's Giotto mission to Comet Halley was named after him.
This artist's impression shows the Rosetta spacecraft, its lander, and a comet.
Rosetta’s 11-year mission began in 2004, with an Ariane-5 launch from Kourou in French Guiana. The three-tonne spacecraft is on its way towards the outer Solar System.
Credits: ESA 2001