 On September 26, 2022, NASA's Double Asteroid Reduction Test, DART for short, intentionally crashed into Dimarphus, the asteroid moonlet in the double asteroid system of Didymos. DART was traveling at nearly 24,000 km per hour, at the point of impact, that's 15,000 miles per hour. It was the world's first test of the kinetic impact mitigation technique using a spacecraft to deflect an asteroid to modify the object's orbit. It's a test designed to increase our knowledge about diverting any asteroid heading our way in the future. The James Webb and Hubble Space Telescope captured the event. Here's Hubble's images taken 22 minutes, 5 hours, and 8.2 hours after impact. They show expanding plumes of ejecta that appear as rays stretching out from the body of the asteroid. Here's how it looked from Webb. Combine Hubble and Webb analysis will allow scientists to gain knowledge about the nature of the surface and how much material was ejected by the collision and how fast it was ejected and the distribution of particle sizes in the expanding dust cloud. Repeated observations from Hubble over the weeks following the impact show that the ejected material has expanded and faded in brightness. This was expected. What's surprising is that the tail fades into a double tail. This behavior is common for comets and active asteroids, but was not expected for this asteroid system.