The New Technology Telescope (NTT) (part 4)
The New Technology Telescope (NTT) is a 3.6-metre optical telescope located at La Silla Observatory in Chile. The NTT has a very thin primary mirror supported with active optics which keep the mirror in the correct shape. It was commissioned in 1989, but it was considerably upgraded in 1996 and 1997, during the so-called NTT "Big-Bang".
About the Video
|Release date:||4 December 2009, 00:17|
About the Object
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