HomeTechnologyHow Does the Cat's Eye Nebula Sound Like? NASA Post

How Does the Cat’s Eye Nebula Sound Like? NASA Post


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A nebula is a giant cloud of dust and gas occupying the space between stars. We have seen many images of different kinds of nebulae, thanks to the observatories scientists have made over the years. Now, can you imagine how these cosmic clouds appear when interpreted as sound? NASA‘s Hubble Space Telescope has shared a video on Instagram that shows sonification of data of Cat’s Eye nebula captured by it and the agency’s Chandra X-ray observatory. “Experience the Cat’s Eye nebula through sound,” the post said.

A planetary nebula forms when Sun-like stars eject their outer gaseous layers to form bright nebulae. Scientists believe that the Cat’s Eye Nebula, also known as NGC 6543, was formed after the star ejected its mass in a series of pulses at 1500-year intervals. And thus, the image appears like an onion cut in half, where each skin layer is discernible. It shows a bull’s eye pattern of eleven or even more concentric shells around the “Cat’s Eye”. Each shell is the edge of a spherical bubble.

Astronomers have proposed several explanations for these rings-like patterns, including cycles of magnetic activity somewhat similar to our own Sun’s sunspot cycle and stellar pulsations.

This information is represented as music using the data sonification technology. The post said X-rays from the Chandra observatory are represented by a harsher sound, while the visible light data from Hubble sound smoother.

“A radar-like scan of the image emanates from the centre point of the nebula and moves clockwise to produce pitch. The light that is further from the centre is heard as higher pitches while brighter light is louder,” the post said. The circular rings create a constant hum.

NASA said when a star like the Sun begins to run out of helium to burn, it blows off huge clouds of gas and dust. These outbursts can form spectacular structures such as the one seen in the Cat’s Eye nebula.

The Hubble telescope has been serving for over 30 years. It will soon be succeeded by the costlier, more powerful James Webb Space Telescope.

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