The Explorers of Mars Hill

Established in 1894 in Flagstaff, Arizona by Percival Lowell, the Lowell Observatory on Mars Hill is still remembered as the site of numerous important astronomical firsts. The great recessional velocities of galaxies were first observed here in the years immediately before the first world war, a discovery that ultimately led scientists to the realization that our universe is expanding. In 1930, the dwarf planet Pluto was discovered at Lowell by astronomer Clyde Tombaugh. This volume is a s...