Tag: Amateur Astronomy

Dante and the Early Astronomer
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Dante and the Early Astronomer

In his recently released book, “Dante and the Early Astronomer: Science, Adventure, and a Victorian Woman Who Opened the Heavens,” Tracy Daugherty tells the story of Mary Acworth Evershed, a pioneering female amateur astronomer who was fascinated with Dante Alighieri. Daugherty is a professor emeritus of English and creative writing […]

Zenithstar 103 Imaging F/6.9 Apo
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Zenithstar 103 Imaging F/6.9 Apo

  The heart of William Optics’ Super ZenithStar 103 f/6.9 imaging APO is a f/6.9 air-spaced FPL53 doublet housed in a CNC-machined ultra-precision lens cell. Add a 0.8x flattener/reducer, and the focal ratio becomes f/5.5. Focus duties are performed by the Zenithstar 103 ultra-robust 2.5-inch, 1:10 dual-speed, rack-and-pinion focuser with […]