There aren’t too many geek milestones we can measure a millennium out, but here’s one of them: exactly one thousand years ago, the brightest celestial event in recorded human history appeared in the skies over planet Earth, and lasted for three years. And we know about it because of the geeky astronomers in Europe and Asia who blogged about it. Tim at Goats Reading Books has a nice summary of everything we know about supernova 1006, which was first seen on April 30 or May 1, 1006, including what the geeks at the time had to say about it:
The "guest star" was widely noticed: observations have survived from China, Japan, Egypt, Iraq, Yemen, Italy, and Switzerland. It made a big impression on the Chinese court astronomers, who kept very meticulous records of its position, and who reported:its appearance was like the half Moon and it had pointed rays...
[It was] so brilliant that one could really see things clearly [by its light]Another astronmer in San'a, Yemen observed:
It rose regularly half an hour after sunset. It was not round, but rather was elongated; at its edges were lines like fingers. It showed great turbulence as though (reflected) in disturbed waters.
The monks at the Benedictine Abbey in St. Gallens, Switzerland also recorded the guest star:
A new star of unusual size appeared; it was glittering in appearance and dazzling the eyes, causing alarm. In a wonderful manner it was sometimes contracted, sometimes spread out, and moreover sometimes extinguished. It was seen, nevertheless, for three months in the inmost limits of the south, beyond all the constellations which are seen in the sky.
I like that the monks thought the supernova was “wonderful”...
Related cool links:
• Today’s Astronomy Picture of the Day is an illustration that approximates what SN 1006 might have looked like in our sky.
• The Wikipedia entry for the event discusses how bright the exploded star would have been: “Some sources state that the star was bright enough to cast shadows; it was certainly seen during daylight hours for some time, and the modern-day astronomer Frank Winkler has said that ‘in the spring of 1006, people could probably have read manuscripts at midnight by its light.’” Cool!
• A thread at Ask Metafilter discusses how to survive a supernova. (“Apparently, 30 light years is the bare minimum before mass extinction.)
• SF writer Charles Sheffield’s novel Aftermath speculates what might happen if one of the stars in the Alpha Centauri system went nova.































