This is a beautiful sheet of 5 stamps, issued by Guinea-Bissau in 2010, displaying asteroids. Featured minor planets in space shown are the 433 Eros Near-Earth asteroid, the main belt asteroid 253 Mathilde, the 243 Ida asteroid after being visited by the Galileo spacecraft, the 951 Gaspra S-Type asteroid, and the 99942 Apophis Near-Earth asteroid. The sheet is Michel catalog #4557-61, and is Post Office fresh, mint never hinged, and F/VF.