extrasolar planet orbiting beyond five AU (55 Cancri d), and the first Neptune-sized planets (Gliese 436b and 55 Cancri e). Marcy was a co-investigator of the NASA Kepler mission that discovered over 4000 exoplanets, most being smaller than four times the size of Earth. His team, led by Erik Petigura and Andrew Howard, showed that approximately 20% of Sun-like stars have a planet of one to two times the size of Earth and receive incident stellar light within a factor of four of the light the Earth receives from the Sun, making them warm planets, many of which accommodate liquid water. Sexual harassment and resignation In 2015, an investigation by the University of California, Berkeley, Title IX office found that Geoffrey Marcy had violated the university's sexual harassment policy between 2001 and 2010. Four complaints were filed with the university's Title IX office, one of which Marcy denied. At least three additional allegations were made against Marcy as early as 1995 while he was at San Francisco State University, as corroborated by Penny Nixon, then SFSU's sexual harassment officer. On October 7, 2015, Geoff Marcy posted an "Open Letter to the Astronomy Community" stating "While I do not agree with each complaint that was made, it is clear that my behavior was unwelcomed by some women. I take full responsibility and hold myself completely accountable for my actions and the impact they had. For that and to the women affected, I sincerely apologize." On October 12, 2015, the UC Berkeley Astronomy Department met and released a statement asserting that Marcy was "inadequately disciplined" by the university, and "we believe that Geoff Marcy cannot perform the functions of a faculty member." Berkeley had recently been found on a list produced by the United States Department of Education's Office for Civil Rights, revealing that they were under review for potentially mishandling previous sexual violence cases. In a follow-up statement, the university claimed they had "imposed real consequences on Professor Geoff Marcy by establishing a zero tolerance policy regarding future behavior and by stripping him of the procedural protections that all other faculty members enjoy". On the same day, Marcy resigned as principal investigator of the Breakthrough Listen project. Two days later, on October 14, 2015, he indicated his intention to step down from his professorship at UC Berkeley. Marcy retained the title of emeritus despite his resignation. Later career In May 2017,