posted on Nov, 19 2021 @ 04:48 AM
a reply to: musicismagic
It depends. On the region you ask this question for or if you ask universally.
The moon isn't circling the Earth in a perfect circle. Apogee is the point where the moon is at maximum distance away from Earth. Then, for an eclipse
to happen, the Sun, Earth and Moon need to align on a straight line.
For a lunar eclipse like this to happen, the moon also needs to be on the same plane, because space is 3D. For you to be able to see it, the rotation
of Earth (time), differently said, your location, needs to align with the timespan of the event.
So for the US to experience it, it's around 588 years I think this happened the last time. Imagine every one of these factors is a metronome with a
1Hz = 1 Day
Earth location (365Hz)
Moon location (27.32 Hz)
Apogee reached (27.32 Hz/2)
Rotation of Earth divided by longitude 6° (1Hz/(360°/6))
Ecliptic angle of the moon (27.32Hz/2)
So you have at least five metronomes, some ticking at the same frequency, some at half of it, some at fractions and to make things complicated, they
were not set in motion at the same time. When all click at once, that's the moment.
Maybe you can imagine better now, why this is a very rare occurance.
edit on 19.11.2021 by ThatDamnDuckAgain because: (no reason given)