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JohnHoltz
  • Pennsylvania, United States
  • Member for 4 years, 2 months
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About

I have been an amateur astronomer since the late 1970's. I enjoy observational astronomy, mathematics, and spaceflight. Cosmology and astrophysics are not as interesting to me.

In the past, I observed occultations (total and grazing lunar, asteroidal) and variable stars. Since my free time is limited now, I mostly enjoy watching satellites pass over.

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106 If Earth is tilted, why is Polaris always above the same spot? Apr 28 '19
41 Why do satellites arcs end abruptly when observed from Earth Dec 26 '18
34 Did I see a supernova explosion? Sep 12 '20
21 Does the sun's rising/setting angle change every few months? Nov 4 '20
15 Why moon sighted only in Kerala but not in rest of India? Jun 14 '18
13 Does this photo show the "Little Dipper" and "Big Dipper"? Dec 17 '20
11 Are there any galaxies visible in the night sky around the Orion constellation? Nov 1 '19
11 How is this the last supermoon of 2019? Mar 21 '19
9 Why is today the shortest day but the solstice is actually tomorrow? Dec 21 '20
9 Is it possible to explain the difference between synodic month and sidereal month by degrees? Apr 15 '20
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