The supernova that caused the nebula was recorded by Japanese and Chinese astronomers in the 12th century. Now, we know exactly what the aftermath looks like.
Somewhere out in deep space, there’s a beautiful cosmic weed, blasting its metaphorical pollen away from its core at ludicrous speeds. For almost 900 years, the massive space explosion that caused this weed to bloom was a mystery. Now, a cutting edge telescope is providing our best look yet at the results.
Humanity’s interest in the nebula can be traced back to the year 1181, when astronomers in Japan and China both recorded seeing a new star. After six months, it was gone, but not forgotten. In 2013, an amateur astronomer named Dana Patchick was looking at images taken by NASA’s Wide-field Infrared Survey Explorer, a now-decommissioned infrared space telescope.
Cunningham and his colleagues wanted to get a better idea of the shape of those filaments. They turned to a device in Hawaii called the Keck Cosmic Web Imager , which detects light in the visible spectrum. Different colors move with different amounts of energy. For instance, blue has relatively high energy levels compared to red. The difference in energy allowed the astronomers to map out which matter was moving in the Earth’s direction, and which was moving away.
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