Milky Way’s hidden supernova revealed by JWST

This image from NASA’s Chandra X-ray Observatory shows the location of different elements in the Cassiopeia A supernova remnant including silicon (red), sulfur (yellow), calcium (green) and iron (purple), as well as the overlay of all such elements (top). A supernova remnant expels heavy elements created in the explosion back into the Universe. Although it isn’t shown here, the ratio of U-235 to U-238 in supernovae is approximately 1.6:1, indicating that Earth was born from largely ancient, not recently, created raw uranium. (<a href="https://chandra.harvard.edu/photo/2013/casa/more.html" rel="noopener ugc nofollow" target="_blank">Credit</a>: NASA/CXC/SAO) <a href="https://medium.com/starts-with-a-bang/milky-ways-hidden-supernova-revealed-by-jwst-c0237ada44a7">Read More</a>