Category
page 11961 in science
Tsar Bomba
hydrogen aerial bomb tested in 1961 by the Soviet Union; most powerful nuclear weapon ever created
Project West Ford
experimental space-based radio communication project
solar eclipse of February 15, 1961
20th-century total solar eclipse
bark scale
auditory frequency metric
1961 in science
overview of natural science-related events during the year of 1961
Comet Humason
comet
Palomar–Leiden survey
astronomical survey of minor planets in the Solar System
solar eclipse of August 11, 1961
Solar eclipse