Kitt Peak at Sunset Location: Kitt Peak National Observatory, AZ Year: 2007 Merckslides catalogue number: 25(06)-24027 Comments:

Kitt Peak at Sunset Location: Kitt Peak National Observatory, AZ Year: 2009 Merckslides catalogue number: 06-70371 Comments:

Sunset from atop Kitt Peak Location: Kitt Peak National Observatory, AZ Year: 2009 Merckslides catalogue number: 06-70371 Comments:

Sunset from atop Kitt Peak Location: Kitt Peak National Observatory, AZ Year: 2009 Merckslides catalogue number: 06-70392 Comments:

Sunset from atop Kitt Peak Location: Kitt Peak National Observatory, AZ Year: 2009 Merckdigitals catalogue number: 06-70399 Comments:

Sunset from Kitt Peak Observatory Location: Kitt Peak National Observatory, AZ Year: 2011 Merckdigitals catalogue number: 06-75268 Comments:

Sunset from Kitt Peak Observatory Location: Kitt Peak National Observatory, AZ Year: 2014 Merckdigitals catalogue number: 06-86156 Comments:

Sunset from Kitt Peak Observatory Location: Kitt Peak National Observatory, AZ Year: 2016 Merckdigitals catalogue number: 06-89548 Comments:

Sunset from Kitt Peak Observatory Location: Kitt Peak National Observatory, AZ Year: 2016 Merckdigitals catalogue number: 06-89550 Comments:

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