Kuiper (center) founded the Lunar and Planetary Lab in Arizona in 1960. Gerard Peter Kuiper (1905-1973) was a Dutch-American astronomer after whom the Kuiper belt was named. He had extraordinarily sharp eyesight, allowing him to see magnitude 7.5 stars with the naked eye, about four times fainter than visible to normal eyes. Kuiper discovered two natural satellites of planets in the solar system, namely Uranus's satellite Miranda and Neptune's satellite Nereid. In addition, he discovered carbon dioxide in the atmosphere of Mars and the existence of a methane-laced atmosphere above Saturn's satellite Titan in 1944.