New images of the Butterfly Nebula and the Jewel Bug Nebula taken by the NASA/ESA Hubble Space Telescope are revealing information about how planetary nebulae develop their dramatic features. The Butterfly Nebula: on top is an image captured by Hubble in 2019; further analysis by Kastner et al. produced the RGB image on the bottom, which shows extinction due to dust, as inferred from the relative strength of two hydrogen emission lines, as red; emission...