Wil Tirion (19 February 1943 – 5 July 2024) was a Dutch uranographer (celestial cartographer). His most famous work, Sky Atlas 2000.0, is renowned by astronomers for its accuracy and beauty.[1] The second edition of his most complete work, Uranometria 2000.0, was published in 2001 by Willmann-Bell.[2] He was also responsible for the sky charts found in many other publications. He was originally a graphic designer. The minor planet (asteroid) 4648 Tirion is named after him. Tirion died on 5 July 2024, at the age of 81.[3]