Percival Lowell, Lowell Observatory, and Pluto

摘要

This issue we have an interesting pair of anniversaries: February 18 is the 75th anniversary of Clyde Tombaugh's discovery of the planet Pluto at Lowell Observatory in 1930; and March 13 is the 150th anniversary of the birth of the founder of that observatory, Percival Lowell, almost exactly 75 years earlier in 1855.