There are more stages involved here than I've got time to tell you about, but basically we drive through the space, we populate it with environmental variables -- sulphide, halide, things like that.
Há aqui mais etapas envolvidas do que o tempo que tenho para falar, mas, basicamente, viajamos pelo espaço, enchemo-lo com variáveis ambientais — sulfuretos, iodetos, coisas dessas.