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The James Webb Space Telescope has unveiled a bubble-dominated morphology in nearby star-forming galaxies, giving them a new popular name of phantom galaxies. The unprecedented spatial resolution of the JWST and the filters it is equipped with allow the identification of millions of stars in these galaxies. We have been analysing these datasets to address several interesting research problems, such as understanding the origin of bubbles, the details of massive star evolution, and the determination of the metallicity of the oldest disk stars. The last of these studies provides an efficient novel method of exploring the formation epochs of disks in galaxies. In the colloquium, I will give the current status of our studies in these fields.