A Supernova Observed 1000 Years Back Is Still Expanding Today

 On July 4, 1054, Chinese astronomers noted a “guest star” in the Taurus stars. Later studies revealed coexistent observations in Japan and the Middle East.

Momentarily surpassing Venus, it disappeared after almost two years, a typical supernova. Hundreds of years later, its remains were astronomically discovered. John Bevis discovered it in 1731, but it was a big source of uncertainty in 1758.

Halley’s comet was due to return that year, too in Taurus. But, this vague, fuzzy, dim sight perplexed many. It wasn’t a comet, but a faraway object ~6,500 light-years away.

Rediscovered independently by Charles Messier, it sparked the formation of astronomy’s most popular catalogue. Almost a millennium later, we actively find this remnant growing.

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