2018 VISION: SEEING ANEW
The 2006 image (top) was taken by the Hubble Space Telescope and shows the tattered remains of a supernova explosion known as Cassiopeia A in our own Milky Way. By 2018, astronomers were able to use NASA’S Chandra X-ray Observatory to detect an important type of titanium (light blue) in the remnant, offering a new insight into understanding exactly how these massive stars explode: the titanium is predicted to form in bubbles that drive the explosion after the star’s energy is depleted and it implodes.