A second JWST epoch of WR 140 shows its dust shells expanding at nearly constant speeds near the stellar wind speed, with clumpy substructures persisting for over a year.
Top: video that blinks between the Cycle 1 and Cycle 2 images at 7.7 μm showing the entire system
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Dynamic Imprints of Colliding-wind Dust Formation from WR140
A second JWST epoch of WR 140 shows its dust shells expanding at nearly constant speeds near the stellar wind speed, with clumpy substructures persisting for over a year.