We describe the collective behavior of isotropic droplets dispersed over a spherical smectic bubble, observed under microgravity conditions on the International Space Station (ISS). We find that droplets can form two-dimensional hexagonal structures changing with time. Our analysis indicates the possibility of spatial and temporal periodicity of such structures of droplets. Quantitative analysis of the hexagonal structure including the first three coordination circles was performed. A peculiar periodic-in-time ordering of the droplets, related to one-dimensional motion of droplets with non-uniform velocity, was found.

中文翻译：

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微重力条件下近晶气泡上各向同性夹杂物剪切乳液中的瞬态六方结构

我们描述了在国际空间站（ISS）微重力条件下观察到的分散在球形近晶泡上的各向同性液滴的集体行为。我们发现液滴可以形成随时间变化的二维六边形结构。我们的分析表明这种液滴结构可能具有空间和时间周期性。对包括前三个配位环的六边形结构进行了定量分析。发现了与具有不均匀速度的液滴的一维运动相关的液滴的特殊的时间周期排序。