original: Galileo imaged almost all of the surface of Metis and put constraints on its composition by 1998.
simplifications: Galileo imaged most of Metis's surface. It put limits on its form by 1998. Galileo imaged most of Metis in 1998. Galileo photographed most of Metis' surface and put limits on its composition by 1998. Galileo photographed almost the entire the surface of Metis. It put constraints on its composition by 1998. Galileo imaged almost all of the surface of Metis. He put constraints on its composition by 1998. Galileo took pictures of almost all of the surface of Metis. It put constraints on its composition by 1998. Galileo imaged most of the Metis surface and put constraints on its composition by 1998. Galileo took images of almost the entire surface of Metis by 1998. Galileo imaged almost all of the surface of Metis. He also put constraints on its composition by 1998. Galileo had painted almost all of the surface of Metis and had placed restrictions on its composition by 1998.