Step Done 2026-10-25

Checked whether Europe could see the 1054 supernova

Computed the star's height at dawn in July 1054 for China, the Near East and Europe (nearly the same), showed the Japanese '4th month' date is impossible (star beside the Sun) while the 5th month fits, and compared Europe's record of the three medieval supernovae. Visibility is not the answer; record keeping is. A full comet base rate (Hasegawa 1980) could not be downloaded.

How it connects

This step led us to Europe had nearly the same view of the 1054 star as China

This step led us to The Japanese '4th month' date for the 1054 star is impossible; the 5th month fits

This step led us to Europe missed the 1054 star because it was badly placed for European skies

This step is about Why did Europe barely record the supernova of 1054?

This step and then Read US death rates by cause 1910 to 1938 and tested sleepy sickness against flu

This step came after Reran the Odyssey eclipse date search over 1,400 years