They look like planets: Two droplets move in orbits on an ice cold fluid surface. They attract each other, and by almost frictionless movement on their own vapour, they skate around each other. It is a fascinating mechanism that could be used for preparing and transporting biological samples with a minimum of contamination. Researchers of the University of Twente have published a study on this subject titled “Capillary Orbits” in Nature Communications.
Click here for original story, Skating droplets move in orbits
Source: Phys.org