In space - ether. We cannot directly investigate it. According to the science of ether dynamics, the pressure in the ether is taken 10 to 32 degrees. I take this into my calculations.A vortex can be sustained when fluid pressures are around atmospheric .... spiraling air molecules pull away from the center of rotation by centrifugal force , and reduced pressure at the axis pulls them back , hence a sustained vortex.... a whirlwind
In space the fluid pressure is incredibly low , pressure differences within this fluid would never be enough to stop spiraling atoms from escaping ...A vortex could not be sustained .