Why exactly a bubble looks stable and suddenly blows out? The phenomenon is not visible, but it is real. The total weight of the bubble is absolutely negligible compared to its volume, so it floats in the air. However, at a molecular level, a bubble is not stable. The water in its thin skin is still more dense than air and still tries to go down. Therefore the thickness of the envelop slightly increases at the bottom, and decreases at the top. After a few seconds, the skin becomes too thin at a specific point, and the bubble ceases to exist.

A parallel can be made in space as the gravity of a planet has a similar impact on its moons. Our own moon always shows the same face because its slightly egg-ish shape is oriented towards us. If a moon gets too close from its planet, the distortion will break it out pretty much like a (very slow) bubble.

In order to speed up the process, some help may be needed to crack the shell more quickly than the gravity.

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Sunday, October 15 2017