At 6,800 feet in altitude,McDonald Observatory atop Mt. Locke in Ft. Davis,Texas,enjoys some of the clearest and darkest skies in the continental United States. Seen at lower left is a Dobsonian telescope,a device consisting of a Newtonian telescope tube (a type of telescope that uses curved mirrors) on an alt-azimuth,or Dobson,mount. This is a composite photo | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Landolfi, Larry |
Bildgröße: | 3000 px × 4246 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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