Since they first hit the U.S. market some 10 years ago, Sky-Watcher USA telescopes have become synonymous with great value. Whether you’re talking about refractors or reflectors, these high-quality ...
A very intense burst of Hydrogen-alpha (H-alpha) on the limb side of of this sunspot was imaged with a Coronado 90mm SolarMax H-alpha filter and a Meade 5-inch apochromatic refractor. All images Jack ...
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