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How Often Do You Use Your Telescope?

Introduction of the Questar Solar Observatory and SunShield accessory.

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Questar advertisement, <em>Sky and Telescope</em>, November 1991
Questar advertisement, Sky and Telescope, November 1991. Questar Corporation

Astronomy, September 1991, 31.
Sky and Telescope, October 1991, IFC.
Astronomy, October 1991, 27.
Sky and Telescope, November 1991, IFC.
Sky and Telescope, February 1992, IFC.
Sky and Telescope, March 1992, IFC.
Sky and Telescope, March 1993, IFC.
Sky and Telescope, April 1993, IFC.