宇宙空间的金属实验是与空间实验室同时提出的研究课题。美国计划在1988年用航天飞机上的空间实验室里进行为期一周的金属实验;与此同时,日本也确定了在空间进行金属实验的五项研究课题。这五项课题有:1.利用浮游熔解法提炼化合物半导体的单晶体; The metal experiment in space is a research topic put forward simultaneously with the space laboratory. The United States plans to conduct a one-week metal experiment in the Space Laboratory on the space shuttle in 1988; at the same time, Japan has also identified five research topics in space for metal experiments. The five topics are: 1. The use of floatation melting compound semiconductor single crystal;