John prepares to give a mirror grinding demonstration. In this shot Mr. Dobson carefully applies # 80 Silicon Carbide Grinding grit on the surface of the 8 inch tool and will sprinkle some water over the grit to prepare the surfaces for work.

Al Paslow Astronomy Collection

Images and events of personal interest.

John Dobson on April 1, 2006 attended Astronomy Day at the Carnegie Science Center, in Pittsburgh PA. He gave a talk in the Planetarium followed by questions and answers to a good number of interested people.

A telescope mirror grinding demonistration was next using a 12.5 inch mirror blank.

Mr.Dobson's final stop was to tour Mingo Creek Park Observatory in Washington County PA.

Here are some images of the events:

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John prepares to give a mirror grinding demonstration.

In this shot Mr. Dobson carefully applies # 80 Silicon Carbide Grinding grit on the surface of the 8 inch tool and will sprinkle some water over the grit to prepare the surfaces for work.