This paper describes the use of a stream of liquid droplets as a lightweight radiator for space. This concept retains the low-mass advantages of a dust radiator, and has the additional advantages of allowing heat transfer by conduction (heat exchanger) and ease of manipulation. To indicate the degree of improvement possible using droplets instead of tube and fin structures to radiate heat, note that radiator performance is characterized by the specific mass, i. e. , mass per radiating area.