Complex sentence: Isaac soon discovers that Tau Volantis is the Marker Home World, and that the expedition 200 years ago involved a Machine and the phrase "turn it off" and Carver starting to have hallucinations of his deceased wife and son.
Split into simpler sentences: Isaac soon discovers that Tau Volantis is the Marker Home World, and that the expedition 200 years ago involved a Machine and the phrase "turn it off". Meanwhile, Carver starts to have hallucinations of his deceased wife and son.