ALMA aimed its sharpest configuration at 11 compact disks in the Lupus star-forming region and found the rings, gaps, and cavities (https://www.techexplorist.com/tiny-planet-forming-disks-reveal-big-surprise-planets-born/105852/) hiding inside disks that had looked smooth. The neatest find sits in Sz 112, a central cavity only 1.6 AU from its star.
Source: https://www.techexplorist.com/tiny-planet-forming-disks-reveal-big-surprise-planets-born/105852/
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