image: Relaxation of a 4He crystal in a superfluid is under zero gravity after manipulation by acoustic radiation pressure. This material relates to a paper that appeared in the Oct. 23, 2015, issue of Science, published by AAAS. The paper, by T. Takahashi at Tokyo Institute of Technology in Tokyo, Japan, and colleagues was titled, "Equilibrium shape of 4He crystal under zero gravity below 200 mK." view more
Credit: [Credit: Tokyo Institute of Technology, Okuda Group]