Solaris (2002)

This is a solid movie. Psychologist Chris Kelvin (George Clooney) is sent to a spaceship orbiting the strange planet of Solaris, after receiving a desperate plea from one of the crew members. The passengers are experiencing bizarre phenomena and aren't sure what is causing it. When Kelvin arrives he discovers that several of the scientists are either dead or missing. After the first night of sleep he awakens and learns that his dreams have become reality. Mysterious visitors appear out of nowhere and the surviving crew is not sure whether these people are truly human or just products of their imagination.

This film and the 1972 Russian version were both adapted from the 1961 novel written by Polish author Stanisław Lem. The Kelvin scale measures absolute temperature starting at the lowest level of absolute zero. It can be calculated by adding 273.15 degrees to any Celsius temperature.