Online UFO conspiracy theorists claim to have spotted a "sinister" UFO hovering over the lunar surface in an old NASA Apollo 17 NASA image.
The UFO was allegedly monitoring (scroll down to see video) the 1972 Apollo 17 mission crew as they departed from the Moon.
The mysterious UFO spacecraft, allegedly an alien military craft sent to ensure that the Apollo 17 crew comply with orders to leave the Moon and to never return, was spotted in a NASA image taken by the crew as they left the Moon in December 1972 after three days on the lunar surface.
The Apollo 17 mission was the last of NASA's Apollo program, and the crew members were the last men on the Moon.
According to conspiracy theorists, NASA abandoned the Apollo program and never returned to the Moon following the Apollo 17 mission because an alien species that claimed the Moon as their exclusive territory confronted NASA astronauts and warned them not to return because, according to the alleged hostile aliens, NASA was trespassing.
The warning from the hostile aliens forced NASA to curtail the Apollo program and abandon Apollo 18 through 20 missions, according to conspiracy theorists.
Apollo 18 through 20 missions were planned to be "J missions" involving a three-day stay on the lunar surface and three lunar Extra-Vehicular Activities (LEVAs).
The Apollo 17 mission was launched at 12:33 a.m. Eastern Standard Time (EST) on December 7, 1972, and landed on the Moon at 2:55 p.m. EST on December 11.
The crew was made up of Commander Eugene Cernan, Command Module Pilot Ronald Evans, and Lunar Module Pilot Harrison Schmitt.
The mission was a "J-type mission," that is, a three-day scientific mission using an extended lunar module, three lunar Extra-Vehicular activities (LEVAs), and a Lunar Roving Vehicle (LRV).
UFO conspiracy theorists claim that the mysterious UFO hovering in the lunar sky monitoring NASA's last men on the Moon was an alien military craft sent to escort the astronauts off the Moon and to remind them of the warning not to return.
The craft was sent to ensure that the men comply with the order to leave, according to conspiracy theorists.
The NASA image allegedly showing the moment hostile aliens escorted the Apollo 17 crew off the Moon was first uploaded online on May 31, 2016, by the prolific UFO hunter Streetcap1 (see video below).