THE HISTORICAL
MARKER DATABASE
“Bite-Size Bits of Local, National, and Global History”
 
 
 
 
 
 
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Related Historical Markers

Clyde Tombaugh & Lowell Observatory
 
New Mexico State University Library, Archives and Special Collections
Marker detail: Clyde Tombaugh at the Lowell Observatory
one year after discovering Pluto.
SHOWN IN SOURCE-SPECIFIED ORDER
1 ► Illinois, LaSalle County, Streator — Streator's Stargazer —
”I always wanted to know what’s on the other side of the mountain.” —Clyde Tombaugh A Life of Discovery Clyde Tombaugh's love of astronomy began as a young boy growing up near Streator. At age 24, he became famous for . . . — — Map (db m177433) HM
2 ► Illinois, LaSalle County, Streator — Clyde William Tombaugh —
Clyde William Tombaugh was born near Reading (south of Streator) in 1906. He attended Heenanville Grade School and Streator High School and became interested in astronomy at an early age. In 1922 his family moved to Kansas. He built telescopes and . . . — — Map (db m145184) HM
3 ► Kansas, Pawnee County, Burdett — 109 — Discoverer of Pluto —
Burdett is the boyhood home of Dr. Clyde Tombaugh, discoverer of the planet Pluto. Born in Illinois in 1906, he grew up on a farm northwest of here and was graduated from Burdett High School in 1925. During his youth, Tombaugh explored the . . . — — Map (db m160245) HM
4 ► Arizona, Coconino County, Flagstaff — Lowell Observatory — National Historic Landmark —
Lowell Observatory has been designated a Registered National Historic Landmark Under the provisions of the Historic Sites Act of August 21, 1935 this site possesses exceptional value in commemorating or illustrating the History of The . . . — — Map (db m149455) HM
 
 
  
 
 
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Oct. 2, 2026