the spacecraft consists of two main elements : the nasa cassini orbiter , named after the italian-french astronomer giovanni domenico cassini , and the esa huygens probe , named after the dutch astronomer , mathematician and physicist christiaan huygens .
The above sentence is very complicated. Please provide me a simplified synonymous version consisting of multiple sentences:
the spacecraft consists of two main elements . first is the NASA Cassini orbiter It is named after the Italian-French astronomer Giovanni Domenico Cassini . second is the ESA Huygens probe . it is named after the Dutch astronomer , mathematician and physicist Christiaan Huygens .