Solidification Using a Baffle in Sealed Ampoules ( SUBSA ) is the first investigation conducted in the Microgravity Science Glovebox ( MSG ) Facility at the International Space Station ( ISS ) Alpha . In July , August and September of 2002 , 8 single crystals of InSb , doped with Te and Zn , were directionally solidified in microgravity . Ground based tests , related numerical modeling and images of the growth process obtained in microgravity are presented .