Celestial Events – Page 2 – National Radio Astronomy Observatory

When Did The First Annular Eclipse Occur?

There is in fact a really thorough answer to this question posted to the astronomy stack exchange. Although the…

The Northern Lights (Aurora Borealis/Australis) are only visible at night (or, strictly speaking, when the Sun is not up…

The precession of the Earth’s orbital axis, with a period of about 26000 years, slowly changes the position of…

I believe that the Moon’s declination at the time of the umbral phase of the lunar eclipse on May…

You are correct in that when the Gregorian calendar was adopted in 1545 that the date of the vernal…

For the historical Vernal Equinox calculation you can use the NASA Time and Date of Vernal Equinox calculation page. …

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