The explosive death of a star created this debris cloud, Cassiopeia A, still expanding at shock-wave speeds. This photograph combines an optical image taken by Ken Crawford of the Rancho Del Sol Observatory and X-ray images from NASA's orbiting X-ray telescope NuSTAR, the first telescope to create focused images of high-energy X-rays. Via apod.nasa.gov.
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IC 1340 is the eastern segment of the Veil Nebula, itself also called the Cygnus Loop. It is the result of a supernova explosion visible from Earth about 10,000 years ago. It is about 1,400 light years away from Earth. IC 1340 is about 12 light-years across.
~~Supernova Remnant Cassiopeia A (NASA, Chandra) ~ for the first time, a multiwavelength three-dimensional (3-D) reconstruction of a supernova remnant has been created. This stunning visualization of Cassiopeia A (Cas A), the result of an explosion approximately 330 years ago by NASA's Marshall Space Flight Center~~
The immense Coalsack Nebula is a molecular cloud in the constellation Crux, about 600 light-years away from Earth. Below it in this image is the Dark Doodad Nebula in the constellation Musca. It is about 700 light-years from Earth. Behind it, about 20,000 light-years from Earth, is the globular star cluster NGC 4372.
The first astronomical object cataloged by Charles Messier, M1 is perhaps better known as the Crab Nebula. It's a supernova remnant; its massive explosion visible to skygazers in the year 1054. At its center is a rapidly rotating pulsar - a neutron star - located about 6,500 light-years from Earth in the constellation Taurus.