This new video shows changes in Kepler's Supernova Remnant using data from @NASA's Chandra X-ray Observatory captured over more than two and a half decades. Located about 17,000 light-years from Earth, parts of the remnant are still traveling at roughly 13.8 million miles per hour — or about 2% of the speed of light. More: https://s.si.edu/kepler26 #AAS247 Video Description: This is a silent video of Kepler's expanding Supernova Remnant. The video was created using X-ray data gathered in 2000, 2