 400 years ago, sky watchers including the famous astronomer Johannes Kepler were startled by the sudden appearance of a new star in the western sky, rivaling the brilliance of nearby planets. Modern day astronomers examined the remnant in X-rays that show regions of hot gas, an infrared radiation that shows heated microscopic dust particles that had been swept up by the supernova shockwave, an invisible light that reveals where the supernova shockwave is slamming into the densest regions of surrounding gas. You can see the value of going beyond visible light, Hubble's light image doesn't see the full nature of the supernova remnant, the X-ray and infrared cameras do.