This is about Dr. Chris Kelvin, the main protagonist in Stanislaw Lem's Novel Solaris
Physiological[]
Kelvin answered a request to travel to Solaris Station, to look after his friend and former study colleague Dr. Gibarian.
He stayed on Solaris Station for 65 days and 22 hours, more than two months.
Psychollogically[]
Dr. Kelvin is bothered by the suicide of his first wife ten years ago.
Certain phenomena on Solaris Station make him first apprehensive, but he soon developd an attachment to the thought of redeeming the 'murder' on his wife by interacting with an illusion in a peculiar way.