Overwhelmingly Large Telescope
Proposed extremely large telescope
Overwhelmingly Large Telescope
The Overwhelmingly Large Telescope (OWL) was a conceptual design by the European Southern Observatory (ESO) organisation for an extremely large telescope, which was intended to have a single aperture of 100 metres in diameter. Because of the complexity, cost, and risk of building a telescope of this unprecedented size, ESO decided to focus on the 39-metre diameter Extremely Large Telescope instead.
Read on Wikipedia · Image ESO Telescope Systems Division, CC BY 3.0
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