Dust disk around V883 Ori
ALMA image of V883 Orionis. The dark ring midway through the disk is the water snowline, the point from the star where the temperature and pressure dip low enough for water ice to form.
See "ALMA Observes First Protoplanetary Water Snow Line Thanks to Stellar Outburst" for the details.
Credit: L. Cieza et al.; ALMA (ESO/NAOJ/NRAO)