The Northern Lights (Aurora Borealis/Australis) are only visible at night (or, strictly speaking, when the Sun is not up…
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Does the Precession of the Earth’s Orbital Axis Affect Earth’s Seasons?
The precession of the Earth’s orbital axis, with a period of about 26000 years, slowly changes the position of…

Moon Declination During Lunar Eclipse in May 2022
I believe that the Moon’s declination at the time of the umbral phase of the lunar eclipse on May…

Gregorian Calendar Correction to Vernal Equinox Date
You are correct in that when the Gregorian calendar was adopted in 1545 that the date of the vernal…

Historical Vernal Equinox and Sunset Calculations for Jerusalem
For the historical Vernal Equinox calculation you can use the NASA Time and Date of Vernal Equinox calculation page. …

Beginner Astronomy Resource
Glad to help point you to some astronomy resources for beginners. I think that a very good place to…