![]() ![]() Astronomers estimated before impact that the collision would excavate a crater on the asteroid and blast between 22,000 and 220,000 pounds (between 9,979 and 99,790 kilograms) of surface material, called ejecta, into space.The Hubble Space Telescope, James Webb Space Telescope and ground telescopes were also focused on the system to observe the collision.īy the numbers: DART was expected to be traveling about 14,000 miles per hour (22,530 kilometers per hour) and to weigh 1,260 pounds (571.5 kilograms) when it struck Dimorphos, which is 525 feet (160 meters) in diameter. ![]()
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