From the BBC:
He sold more than 27 million copies of his works, translated into about 40 languages, and a number were filmed.
His 1961 novel Solaris was made into a movie by Russian director Andrei Tarkovsky in 1971 and again by American Steven Soderbergh in 2002.
Soderbergh’s version starred George Clooney and Natascha McElhone.
Lem was born in 1921 in Lviv in Ukraine and studied medicine there before World War II. He moved to Krakow in 1946.