In the 19th century, Alvan Graham Clark was one of the premier lens makers for telescopes. His craftsmanship was sought after and many observatories in the late 19th and early 20th centuries were built to house his refractor telescopes. In fact, smaller Alvan Clark refractors are also sought after by amateur astronomers when they are on the used market.
You have an opportunity to look through a Clark Telescope at the Dearborn Observatory, located at Northwestern (Evanston, IL). The observatory has public viewing on Fridays, weather permitting. And, if you are interested in learning about the history of Alvan Clark refractors, come visit our March fundamentals talk, presented by NAA member Ed Armstrong.
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Not all telescopes use light to observe the universe. Some, like ice cubes, the RadioNeutrino Observatory in Greenland (RNO-G) and the Payload for Ultrahigh Energy Observations (PUEO) look for neutrinos from distant, extragalactic sources by detecting their...
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Amateur astronomy used to be associated with making your own telescope. Stellafane in Vermont still pays homage to the art of telescope making and is approaching its 90th year. However, with the availability of mass produced mirrors, lenses, and complete telescopes,...
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Transient Events That Can Give Us a Good Enough Reason to Get Outside and Do a Little ObservingAll month: the evening sky belongs almost exclusively to Mars again this month, with Mercury playing a supporting role after sunset until mid-July, about the same time that...
Focal Plane June 2025 Astronomy Fundamentals: NAA Welcomes You to Family Fun Night
Our June Fundamentals continues our annual tradition of providing a family night of science. Just because school is out for the summer (not forever), doesn’t mean the opportunity to learn is also on hiatus. If you have some budding science enthusiasts at home, you may...