Solid angle of the bubbles as seen from the center of the star for Model AV (blue), Model A0 (red), and the one-dimensional semi-analytic model based on Model AV. The solid angle—after laminar burning through the initial perturbations—was Ω/4π = 4.4 × 10 ⁻³. The thin gray lines mark the different stages in the bubble's evolution as discussed in the text. Briefly, these phases can be delineated as laminar burn, floatation, vorticity formation, transition to turbulence, and lateral expansion, from left to right.