This is a beautiful sheet of 6 stamps, issued by Mozambique in 2009, commemorating the 400th anniversary of the publication of one of the most influential works by German mathematician & astronomer Johannes Kepler, the "New Astronomy" and the 2009 International Year of Astronomy. Featured on the stamps are the Moon, Kepler's book on astronomy, "Cosmic Mystery", and a Platonic model of the Solar System. The sheet is Scott catalog #1889, and is Post Office fresh, mint never hinged, and F/VF.