The orignal photographic plate log book used by Clyde Tombaugh

May 2005 | By John Kocur
The orignal photographic plate log book used by Clyde Tombaugh The orignal photographic plate log book used by Clyde Tombaugh to record each exposed plate taken at the 13" scope. The last entry on this page, dated January 29 was one of the two discovery plates. It took Tombaugh nine months of searching before he was successful.

See Also

Lowell Observatory/Arizona Trip 2005