Courtesy NASA/JPL/Infrared Telescope FacilityAn amateur astronomer in Australia has discovered a scar on the planet Jupiter indicating a recent collision between the planet and a comet or asteroid. Anthony Wesley noticed the new scar had appeared on the planet’s surface sometime between the hours of 5 a.m and 11 a.m (CDT) on the morning of July 20, 2009. NASA scientists used the agency’s Infrared Telescope Facility on Mauna Kea, Hawaii to confirm the impact. This new collision comes practically fifteen years to the day since the spectacular Levy-Shoemaker comet collided with Jupiter in 1994.
"We were extremely lucky to be seeing Jupiter at exactly the right time, the right hour, the right side of Jupiter to witness the event,” said Glenn Orton, a JPL scientist.
“We couldn't have planned it better."
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UPDATE 7-24-09: I've added this new Hubble photo of Jupiter impact site via Space.com
Courtesy NASA, ESA, H. Hamel (Space Science Institute, and the Jupiter Impact Team.