I'm with you there, but I geuss it's an Japanse/American coproduction
Other faves:
The Host (Korean)
City of Lost Children (French)
Solaris (Russian)
Godzilla, Mothra, King Ghidorah: All Out Monster Attack (Japanese)
You are referring to the 1972 Solaris/Солярис, other good Russian films are Night Watch, Day Watch (not as good as Night Watch), Stalker (1979), The Color of Pomegranates (1969), Come and See (1985) and few others ... ok actually a lot of others.