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Stellar winds hint at how planetary nebulae get their stunning shapes

In their dying throes, some stars leave behind beautiful planetary nebulae — disk, spiral or even butterfly-shaped clouds of dust and gas (SN: 5/17/18). How these fantastically shaped clouds arise…

Astronomers observe stellar winds from aging stars in unprecedented detail

Sept. 17 (UPI) — Astronomers have captured high resolution images of stellar winds emanating from a diversity of aging stars. The observations, detailed Thursday in the journal Science, suggest the…