AFTER TESTING SKY-WATCHER'S 18-inch Stargate truss-tube Dobsonian for several months late last year, it's easy to understand why deep-sky observers proclaim that aperture is king. Objects that appear faint and ill-defined in smaller scopes take on a whole new dimension in an 18-inch. Many globular clusters are transformed from small, fuzzy glows into brilliant spheres of sparkling stars. Lots of planetary nebulae appear large and bright enough to show obvious structure not seen with smaller apertures. And the fields surrounding many familiar deep-sky objects are filled with a multitude of faint background stars lending 3D-like perspectives.
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