August 12, 2024
#2971: Celestial Event explain
{{incomplete transcript|Do NOT delete this tag too soon.}}
Approximate frequency in my area
Active northern lights: 20 days per solar cycle
A naked-eye “Great Comet”: 2 months every 50 years
Total eclipse: once every 350 years
Clear skies: 50% of the time
17-year cicada emergence: 2 months every 17 years
opening bracket
20 days over 11 years multiplied by
2 months over 50 years multiplied by
1 over 350 years multiplied by
one half multiplied by
2 months over 17 years
closing bracket to the power of -1
equals 4.3 billion years
[Caption below the panel:]
Every 4 billion years or so, my neighborhood gets to see a really spectacular show.