Eugene Andrew Cernan (//; March 14, 1934 – January 16, 2017) was an American astronaut, naval aviator, electrical engineer, aeronautical engineer, and fighter pilot. During the Apollo 17 mission, Cernan became the eleventh person to walk on the moon and, as of 2018, is the last person to have walked on the Moon by virtue of being the last man to re-enter the lunar module.
Cernan traveled into space three times; as pilot of Gemini 9A in June 1966, as lunar module pilot of Apollo 10 in May 1969, and as commander of Apollo 17 in December 1972, the final Apollo lunar landing. Cernan was also a backup crew member of the Gemini 12, Apollo 7 and Apollo 14 space missions.
Cernan was born on March 14, 1934, in Chicago, Illinois; he is the son of Rose (née Cihlar) and Andrew Cernan. His father was of Slovak descent and his mother was of Czech ancestry. Cernan grew up in the Illinois towns Bellwood and Maywood. He was a Boy Scout and earned the rank of Second Class. After attending McKinley Elementary School in Bellwood and graduating from Proviso East High School in Maywood in 1952, he studied at Purdue University, where he became a member of Phi Gamma Delta fraternity. After his sophomore year, he accepted a partial Navy ROTC scholarship that required him to serve aboard USS Roanoke between his junior and senior years. In 1956, he received a Bachelor of Science degree in Electrical Engineering; his final GPA was 5.1 out of 6.0.
Cernan was commissioned a U.S. Navy Ensign through the Naval Reserve Officers Training Corps at Purdue, and was initially stationed on the USS Saipan. Cernan changed to active duty and attended flying training at Whiting Field, Baron Field, Naval Air Station Corpus Christi, and Naval Air Station Memphis.:29–31 Following flight training on the T-28 Trojan, T-33 Shooting Star, and F9F Panther, Cernan became a Naval Aviator, flying FJ-4 Fury and A-4 Skyhawk jets in Attack Squadrons 126 and 113.:31–33,38–39 Upon completion of his assignment in Miramar, California, he finished his education in 1963 at the U.S. Naval Postgraduate School with a Master of Science degree in Aeronautical Engineering.
Cernan was originally selected with Thomas Stafford as backup pilot for Gemini 9. When the prime crew was killed in the crash of NASA T-38A "901" (USAF serial 63-8181) at Lambert Field on February 28, 1966, the backup crew became the prime crew—the first time this happened. Gemini 9A encountered a number of problems; the original target vehicle exploded during launch and the planned docking with a substitute target vehicle was made impossible by the failure of a protective shroud to separate after launch. The crew, however, performed a rendezvous that simulated procedures that would be used in the Apollo 10 mission; the first optical rendezvous and a lunar-orbit-abort rendezvous. Cernan performed the second American EVA—the third-ever spacewalk—but overexertion caused by a lack of limb restraints prevented testing of the Astronaut Maneuvering Unit and forced the early termination of the spacewalk. Cernan was also a backup pilot for the Gemini 12 mission.
Cernan was selected for the Lunar Module Pilot position on the backup crew for Apollo 7—although that flight carried no Lunar Module—and standard crew rotation put him in place as the Lunar Module Pilot on Apollo 10—the final dress rehearsal mission for the first Apollo lunar landing—on May 18–26, 1969. During the latter mission, Cernan and Apollo 10 Commander Tom Stafford piloted the Lunar Module Snoopy in lunar orbit to within 8.5 nautical miles (15.7 km) of the lunar surface, successfully executing every phase of a lunar landing up to final powered descent and providing NASA planners with critical knowledge of technical systems and lunar gravitational conditions to enable Apollo 11 to land on the Moon two months later.
Cernan turned down the opportunity to walk on the moon as Lunar Module Pilot of Apollo 16, preferring to risk missing a flight for the opportunity to command his own mission. Cernan moved back into the Apollo rotation as commander of the backup crew of Cernan, Ronald E. Evans, and Joe Engle for Apollo 14, putting him in position through normal crew rotation to command his own crew on Apollo 17. Escalating budget cutbacks for NASA, however, brought the number future lunar missions into question. After the cancellation of Apollo 15 in its original H class profile and Apollo 19 in September 1970, pressure from the scientific community to shift Harrison Schmitt, the sole professional geologist in the active Apollo roster of astronauts, to the crew of Apollo 17, the final surviving Apollo mission, mounted. In August 1971, NASA named Schmitt as the lunar module pilot for Apollo 17, which meant the original LM pilot Joe Engle never had the opportunity to walk on the Moon. Cernan fought to keep his crew together; given the choice of flying with Schmitt as LMP or seeing his entire crew removed from Apollo 17, Cernan chose to fly with Schmitt. Cernan eventually came to have a positive evaluation of Schmitt's abilities; he concluded that Schmitt was an outstanding LM pilot while Engle—notwithstanding his outstanding record as an aircraft test pilot—was merely an adequate one.
Cernan's role as commander of Apollo 17 closed out the Apollo program's lunar exploration mission with a number of record-setting achievements. During the three days of Apollo 17's surface activity (Dec. 11-14, 1972), Cernan and Schmitt performed three EVAs for a total of about 22 hours of exploration of the Taurus–Littrow valley. Their first EVA alone was more than three times the length astronauts Neil Armstrong and Buzz Aldrin spent outside the LM on Apollo 11. During this time Cernan and Schmitt covered more than 35 km (22 mi) using the Lunar Rover and spent a great deal of time collecting geologic samples (including a record 34 kilograms (75 lb) of samples, the most of any Apollo mission) that would shed light on the Moon's early history. Cernan piloted the rover on its final sortie, recording a maximum speed of 11.2 mph (18.0 km/h), giving him the unofficial lunar land speed record.
As Cernan prepared to climb the ladder for the final time, he spoke these words; currently the last spoken by a human standing on the Moon's surface:
Bob, this is Gene, and I'm on the surface; and, as I take man's last step from the surface, back home for some time to come – but we believe not too long into the future – I'd like to just (say) what I believe history will record: that America's challenge of today has forged man's destiny of tomorrow. And, as we leave the Moon at Taurus–Littrow, we leave as we came and, God willing, as we shall return, with peace and hope for all mankind. Godspeed the crew of Apollo 17.— Cernan, 
Cernan's status as the last person to walk on the Moon means Purdue University is the alma mater of both the first person to walk on the Moon—Neil Armstrong—and the most recent. Cernan is one of only three astronauts to travel to the moon on two occasions; the others being Jim Lovell and John Young. As of 2018[update], he is also one of only twelve people to have walked on the Moon. Apollo 10 holds the record for the highest speed attained by any manned vehicle at 39,897 km/h (24,791 mph) during its return from the moon on May 26, 1969.
In 1976, Cernan retired from the Navy with the rank of captain and went from NASA into private business, becoming Executive Vice President of Coral Petroleum Inc before starting his own company, The Cernan Corporation, in 1981. From 1987 he was a contributor to ABC News and the weekly segment of its Good Morning America program titled "Breakthrough", which covered health, science, and medicine.
In 1999, with co-author Donald A. Davis, he published his memoir The Last Man on the Moon, which is about his naval and NASA career. He is featured in the space exploration documentary In the Shadow of the Moon, in which he stated, "truth needs no defense" and "nobody can take those footsteps I made on the surface of the moon away from me". Cernan also contributed to the book of the same name.
Cernan and Neil Armstrong testified before U.S. Congress in 2010 in opposition to the cancellation of the Constellation program, which had been initiated during the George W. Bush administration as part of the Vision for Space Exploration with the aim of returning humans to the Moon and eventually Mars, but was deemed underfunded and unsustainable by the Augustine Commission in 2009.
Cernan paired his criticism of the cancellation of Constellation with expressions of skepticism about Commercial Resupply Services (CRS) and Commercial Crew Development (CCDev), NASA's planned replacements for that program's role in supplying cargo and crew to the International Space Station. Such companies, Cernan warned, "do not yet know what they don’t know". Cernan's view of commercial space companies—in particular SpaceX, which participates in both programs—underwent a positive shift after being debriefed by SpaceX venture capitalist Steve Jurvetson as part of his effort to obtain the signatures of nine Apollo astronauts on a photograph meant as a gift to SpaceX founder Elon Musk to commemorate the first successful SpaceX cargo mission to the ISS in 2012. Eventually, Cernan was won over and signed the photograph; “As I told him these stories of heroic entrepreneurship, I could see his mind turning”, Jurvetson wrote; “He found a reconciliation: ‘I never read any of this in the news. Why doesn’t the press report on this?'” 
In 2016, Cernan appeared in the documentary The Last Man on the Moon, made by British filmmaker Mark Craig and based on Cernan's 1999 memoir of the same title. The film received the Texas Independent Film Award from Houston Film Critics Society and the Movies for Grownups Award from AARP The Magazine.
Cernan was married twice and had one daughter. His first wife was Barbara Jean Atchley, a flight attendant for Continental Airlines whom he married in 1961. They had one daughter, Tracy (born in 1963). The couple separated In 1980 and divorced in 1981. They remained friends. His second marriage was to Jan Nanna Cernan, which lasted for nearly 30 years from 1987 until his death. Cernan gained two step-daughters, Kelly and Danielle.
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Cernan died in a hospital in Houston on January 16, 2017, at the age of 82. He was buried with full military honors at Texas State Cemetery—the first astronaut to be buried there—during a private service on January 25, 2017.
Cernan was a member of several organizations: Fellow, American Astronautical Society; member, Society of Experimental Test Pilots; member, Tau Beta Pi (National Engineering Society), Sigma Xi (National Science Research Society), Phi Gamma Delta (National Social Fraternity), and The Explorers Club.
On July 2, 1974, Cernan was a roaster of Don Rickles on The Dean Martin Celebrity Roast. At the end of the roast, Rickles—who attended the Apollo 17 launch—paid tribute to Cernan as a "delightful, wonderful, great hero". Cernan was featured in the Discovery Channel's documentary miniseries When We Left Earth: The NASA Missions, talking about his involvement and missions as an astronaut. In the 1998 Primetime Emmy Award-winning HBO miniseries From the Earth to the Moon, he was portrayed by Daniel Hugh Kelly.
Cernan's story of leaving the initials of his daughter Tracy on a rock on the moon was prominently mentioned in the 20th episode of the third season of Modern Family. The story, and Cernan's relationship with his daughter, was later adapted into "Tracy's Song" by pop-rock band No More Kings. The story is inaccurate; Cernan did not write his daughter's initials on a rock. He states in the 2014 documentary The Last Man on the Moon that he wrote them in the lunar dust as he left the rover to return to the LEM and Earth.
A recording of Cernan's voice during the Apollo 17 mission was sampled by Daft Punk for "Contact", the last track on their 2013 album Random Access Memories. Cernan's last words from the lunar surface, along with Lunar Module Pilot Harrison Schmitt's recollections, were used by the band Public Service Broadcasting for the song Tomorrow, the final track of their 2015 album The Race for Space.
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