The observations reveal details of a mysterious stage in the life of binary stars when a mutual embrace comes to an end.
This is one of six images taken by NASA Spitzer Space Telescope that show binary stars forming common envelopes.
Astronomers have witnessed a rare and important life event in the evolution of binary star couplings for the first time. surrounded by an expanding shell of material. This shell is matter is leftover from a stage in the stars' evolution called the common envelope phase. swells out and engulfs the other in a cosmic 'embrace.' This results in a mass transfer from the swelled star to its companion that can run out of control.
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