Cassiopeia A in a MillionOne million seconds of x-ray image data were used to construct this view of

Cassiopeia A in a MillionOne million seconds of x-ray image data were used to construct this view of supernova remnant Cassiopeia A, the expanding debris cloud from a stellar explosion. The stunningly detailed image from the Chandra Observatory will allow an unprecedented exploration of the catastrophic fate that awaits stars much more massive than the Sun.Credit: U. Hwang (GSFC/UMD), J.M. Lamming (NRL), et al., CXC, NASA, -- source link
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