Decades: 320s BC 310s BC 300s BC 290s BC 280s BC 270s BC 260s BC 250s BC 240s BC 230s BC 220s BC
Years: 281 BC 280 BC 279 BC 278 BC 277 BC - 276 BC - 275 BC 274 BC 273 BC 272 BC 271 BC
... Peak was selected in 1958 as the site for a national observatory under contract with the National Science Foundation (NSF) and was administered by the ...
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