By Gary Parkerson, Managing Editor Astronomy Technology Today If you live on the mainland U.S., and you are at all like me, you’re already counting the seconds until the August 21, 2017, total eclipse of the Sun … as in, there is literally a countdown timer in the corner of […]
APM’s new 2-inch Ceramic Safety Herschel Prism operates on the principle that only a small portion – approximately five percent – of the incident light is used for the actual observation. Herschel Prisms of the classic design guide the unused and incomparably larger, more energetic portion of light through the […]