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NASA first photographed the rest of the supernova in 1999 in Chandra's "First Light" image. Cassiopeia A is approximately 11 000 light years away or 64 664 879 000 000 miles from Earth. The rest of the supernova is formed in the last moments of a star 's life, when it has run out, collapsed on itself and exploded. The stellar explosion covered stellar matter with the space region around the star, probably around 1680.
When the star has exploded, it may be briefly the brightest object in the night sky.
According to NASA, the image Cassiopeia A or Case A remains Chandra's most iconic snapshot.
The US Space Agency said: "The shock waves generated by this explosion have overloaded the stellar wreck and its environment, making the debris shiny under many types of light, especially X-rays.
"Shortly after Chandra's launch aboard the Space Shuttle Columbia on July 23, 1999, astronomers asked the Observatory to point to Case A.
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"It appeared in the official image of" First Light "by Chandra, published on August 26, 1999, and marked a pivotal moment not only for the observatory, but also for the field of astronomy by X-rays."
A neutron star is a very small but very dense stellar nucleus left by a star that collapses at least 10 times larger than our Sun.
After taking the first image, NASA returned to Cas A to learn more about this neutron star.
NASA said: "A new video shows the evolution of Case A over time, allowing viewers to see the extremely hot gas – about 20 million degrees Fahrenheit – in the rest to develop towards the end. outside.
"This X-ray data was combined with data from another NASA" Great Observatories ", the Hubble Space Telescope, showing delicate filamentous structures of colder gas with temperatures of around 20,000 degrees Fahrenheit. "
The NASA video embedded above shows the observable changes in Case A over a 10-year period.
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Snapshots were taken from 2003 to 2013.
The blue areas on the outer edges of Cas show the expanding shock wave of the supernova.
According to NASA, shock waves are composed of smaller shock waves that are reminiscent of sonic booms.
Within these shock waves, the particles of matter are accelerated at incredible speeds and emit powerful X-rays.
The actual shockwave is moving at a vertiginous speed of about 11 million miles per hour.
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