Tag Archives: church

Solving the gravitation problem

by John Church I posed a gravitation problem in the May Sidereal Times. The problem was to find the time that it would take for two nonmagnetic cubes, 4 cm on an edge, with masses of 1 kilogram each, originally … Continue reading

Posted in September 2019, Sidereal Times | Tagged | Leave a comment

A gravitational challenge

by John Church The AAAP has members who enjoy science and math challenges. I invite all who are interested to try their hands at this one. Consider two identical, homogeneous, nonmagnetic cubes, each having a mass of 1 kg, measuring … Continue reading

Posted in May 2019, Sidereal Times | Tagged | Leave a comment

In Memoriam: Dick Peery

by John Church In Memoriam: Dick Peery Richard D. “Dick” Peery, former Director of the AAAP, passed away on April 3, 2017 at age 75. He held bachelor’s and master’s degrees from Rutgers University and was the former Director of … Continue reading

Posted in October 2018, Sidereal Times | Tagged | Leave a comment

Planetary Photography in the Film Era

by John Church Planetary Photography in the Film Era Back in the 1970’s (BC = “Before Computers”) I had my own modest home darkroom and did a lot of film developing and B&W printing. I was greatly helped in this … Continue reading

Posted in September 2018, Sidereal Times | Tagged | Leave a comment

Daystar

by John Church Fear no more the heat o’ the sun, Nor the furious winter’s rages. – Cymbeline, Act IV Whenever I have trouble getting to sleep, which sometimes happens to people as they get older, I just think about … Continue reading

Posted in May 2018, Sidereal Times | Tagged , | Leave a comment

The Cycle of Eclipses

by John Church Many of my fellow AAAP members will have heard of the “saros”: the 18 years, 11 and one-third day cycle when eclipses of the sun and moon recur with nearly the same circumstances. To be more precise, … Continue reading

Posted in October 2017, Sidereal Times | Tagged , , | Leave a comment

Oregon Trip

Pictures and Videos by AAAP Members and Friends Abhijit Singh, AAAP friend did an excellent job with Nikon Camera and Celestron Filter. John Church’s Cat with Ears Corona!! Images from Gerrit Dispersyn’s Camera. Click to enlarge Pictures from John Church’s … Continue reading

Posted in September 2017, Sidereal Times | Tagged , , | Leave a comment

The Solar Eclipse of August 21, 2017

by John Church As many club members are already aware, we have arranged for a prime viewing site in Oregon for this year’s total solar eclipse. Totality will last for slightly over 2 minutes, beginning shortly after 10 am PDT, … Continue reading

Posted in January 2017, Sidereal Times | Tagged , | 3 Comments