A 3-D map of the strange remains of a supernova seen in 1181 traces the odd tendrils of gas that jut out for several light-years in all directions.
Nobody knows how those tendrils formed. But astronomers now know where they’re going. New observations, reported in the Nov. 1that was seen to detonate almost 900 years ago.
And when they did find the remnant, it looked weird. The supernova appeared to be a kind called type 1a, wherein a white dwarf starStranger still, the star was surrounded by spiky filaments stretching about three light-years in all directions. “This is really unique,” Cunningham says. “There’s no other supernova nebula that shows filaments like this.”
The team found that the system is structured “kind of like a three-layered onion,” Cunningham says. The inner layer is the star. Then there’s a gap of one or two light-years, which ends in a spherical shell of dust. The final layer is the filaments, which emerge from the dust shell.
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