Author Archives: ST Editors

From The Astrophotography Group

by Michael DiMario, Astrophotography Chair Bubble Nebula NGC7635 taken by Michael DiMarioTelescope:       Celestron C9.25 Edge HD at FL 1645mm f7.0Mount:             Losmandy GM811GExposures:       229 subframes @ 300 sec each over 5 nights for 19 hours of integration; ASI2600MC-P; Optolong L-Ultimate filterProcessing … Continue reading

Posted in December 2025, Sidereal Times | Tagged , , , , | Leave a comment

The Perfect Machine

by S. Prasad Ganti “The Perfect Machine” is the name of a book written by Ronald Florence. It covers the design, construction and the installation of the 200 inch Hale telescope at the Mount Palomar observatory, close to San Diego … Continue reading

Posted in December 2025, Sidereal Times | Tagged , , , | Leave a comment

Snippets

compiled by Arlene & David Kaplan Fighting for ‘The Right to Night’ Under Starry, Rural Skies On a Saturday in September in Michigan’s Upper Peninsula, a dozen people navigated through the woods to the shore of Lake Superior, where the … Continue reading

Posted in December 2025, Sidereal Times | Tagged , | Leave a comment

From The Director

by Rex Parker, PhD director@princetonastronomy.org November 11, 2025, Meeting on Campus.  With the close of a very successful season of public observing nights at Washington Crossing Observatory, our main venue for several months will be the evening meetings at Peyton … Continue reading

Posted in November 2025, Sidereal Times | Tagged , , | Leave a comment

From The Program Chair

by Victor Davis The Universe in a Computer The November, 2025 meeting of the AAAP will take place in Peyton Hall on the campus of Princeton University on Tuesday, November 11th at 7:30 PM. As usual, the meeting is open … Continue reading

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Minutes of the October 14, 2025 Meeting

by Gene Allen, Secretary Director Rex Parker opened the meeting in Peyton Hall at 1931 with 25 attending. He reported: Power has finally been restored to the observatory. Members who are exploring Electronically Assisted Astronomy, EAA, are now formally invited … Continue reading

Posted in November 2025, Sidereal Times | Tagged , , | Leave a comment