Before enrolling in University of Kansas, while working at Lowell Observatory looking for Planet X, Clyde Tombaugh discovered this tiny planet that may have once accompanied Triton.
Its atmosphere is frozen for most of its orbit, and encloses bright areas of nitrogen ice, methane crystal, and carbon monoxide. The namesake Express will be sent to study this planet, whose orbit crosses over into that of a neighbor. Before enrolling in University of Kansas, while working at Lowell Observatory looking for Planet X, Clyde Tombaugh discovered this tiny planet that may have once accompanied Triton. FTP name this planet with moon Charon, the outermost, and named for a god of the underworld.
Its atmosphere is frozen for most of its orbit, and encloses bright areas of nitrogen ice, methane crystal, and carbon monoxide.
{Pluto}