The James Webb Space Telescope captured colorful, never-before-seen details in Cassiopeia A, one of the most well-observed remnants of an exploded star
The James Webb Space Telescope has spied colorful, never-before-seen details in one of the most well-observed remnants of an exploded star. The glowing gas and dust of Cassiopeia A is all that remains of a star that exploded in a supernova, and its light reached Earth for the first time 340 years ago. It’s the youngest known supernova remnant in our galaxy, which is why the celestial object has been studied by a multitude of ground and space-based telescopes.
“Compared to previous infrared images, we see incredible detail that we haven’t been able to access before,” said co-investigator Tea Temim, research astronomer at Princeton University, in a statement. Webb’s new infrared image of Cas A has been translated into visible light so the human eye can see the remnant’s colors. Red and orange light on the remnant’s exterior indicates warm dust, where material ejected from the star before it exploded is colliding with surrounding gas and dust.
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