<div class="media_block"><img src="http://unitedyam.com/wp-content/uploads/2025/05/adding-dimension-to-cassiopeia-a.jpg"></div>Cassiopeia A (Cas A) is a supernova remnant located about 11,000 light-years from Earth in the constellation Cassiopeia. It spans approximately 10 light-years.
Cassiopeia A (Cas A) is a supernova remnant located about 11,000 light-years from Earth in the constellation Cassiopeia. It spans approximately 10 light-years.
Source: https://www.nasa.gov/image-detail/3dmodels-casa-2025-astro-2/
