He determined that there was carbon dioxide on Mars and methane  on Titan, and discovered the moons Nereid and Miranda.
He determined that there was carbon dioxide on Mars and methane  on Titan, and discovered the moons Nereid and Miranda. When the  objects labeled 1992 QBI and 1993 FW were discovered, it was proof  of a theory that he had proposed in the 1950s. FTP, name this  Dutch born astronomer, who predicted that a belt of debris, formed  after the emergence of the Solar System, existed beyond Pluto and  expalined the beginnings of short-period comets like Halley's.
He determined that there was carbon dioxide on Mars and methane  on Titan, and discovered the moons Nereid and Miranda.
Gerard {Kuiper}