In which year did observers in China and Japan document the sudden appearance of the guest star that created the Crab Nebula?
Answer
1054
In July 1054, astronomers and observers in Asia, specifically in China and Japan, recorded a brilliant new star in the night sky. This event was so luminous that the star was visible during daylight hours for nearly three weeks and remained observable at night for approximately two years, providing a crucial historical anchor that researchers later linked to the physical expansion of the nebula.
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