Cassiopeia A showcases supernova remnants captured by James Webb Space Telescope
The remnant cloud known as Cassiopeia A illustrates the final stage of a star's life. In images captured by the James Webb Space Telescope, one can see the still-hot filaments of the supernova remnant. It is estimated that the supernova explosion that created this remnant would have been visible in the sky from Earth about 350 years ago.