CTIO 4-meter Blanco telescope
About this image
The Cerro Tololo Inter-American Observatory 4-meter telescope was once the largest optical telescope south of the equator. Located in Chile, the 375-ton instrument is a twin to the Kitt Peak National Observatory Mayall 4-meter telescope in Arizona. Each telescope can detect objects many millions of times fainter than those visible to the unaided eye.
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Minimum credit line: NOAO/AURA/NSF
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