Professor Weston (full name Edward Rolles Weston) is a Satanic character in C. S. Lewis 's The Space Trilogy. He is introduced in the trilogy's first book, Out of the Silent Planet (1938), as an eminent physicist who has invented space travel. He is defeated by the novel's protagonist Elwin Ransom on Mars (known to its inhabitants as " Malacandra "). Weston returns in the second book, in an attempt to wreak havoc on Venus (Perelandra), the "new Eden ".