The acoustics in space, apart from the obvious function of communication has branched out into many other areas of applications. The acoustical positioning device developed at JPL for manipulating and controlling liquid systems in a 0‐genvironment has the potential of becoming one of the most versatile tools for space research and applications. For example, in order to study the liquid drop systems originated from the Newton—Cassini controversy experimentally, we need a free suspended liquid drop without any dense medium surrounding it. Hence, both the 0‐genvironment and the acoustic manipulation chamber appear to be necessary. In order to carry out many of the processes for Material Science Laboratory in Space the melt is to be positioned and formed within a container but without making contact with the container walls. Electromagnetic methods of positioning and forming are limited to melts which are electrically conducting. The acoustical method is useful in the control of any moltem material including material that is electrically nonconducting. In this presentation, I will describe the principle of operation of this apparatus and the results of tests both in our laboratory and in the 0‐genvironment provided by the Johnson Space Center aircraft flights.