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Southern Ring Nebula (MIRI Image)
The NASA/ESA/CSA James Webb Telescope has revealed the cloak of dust around the second star, shown at left in red, at the centre of the Southern Ring Nebula for the first time. It is a hot, dense white dwarf star.
As it transformed into a white dwarf, the star periodically ejected mass — the shells of material you see here. As if on repeat, it contracted, heated up, and then, unable to push out more material, pulsated.
At this stage, it should have shed its last layers. So why is the red star still cloaked in dust? Was material transferred from its …