We’re all familiar with the phrase “the man in the moon,” the idea that the full moon looks like a human face. But what about this far-out notion: Could there be aliens on the moon watching humankind from a relatively close distance? That’s a meaty question that brings out emotional responses from anyone you ask.

For decades, researchers have claimed that strange objects have been seen on or above the moon — things that shouldn’t be there. From mysterious pyramid shapes to unusual moving lights to tall towerlike objects to geometrically oriented buildings and huge glasslike dome structures, stories and pictures abound claiming that Earth’s next-door neighbor is loaded with extraterrestrial artifacts.

“What NASA did not tell the American people is that it discovered the remains of an ancient lunar civilization, and to this day, that data and those artifacts have been withheld from the American people,” claims Richard C. Hoagland, founder of The Enterprise Mission, an extensive private space research analysis website.

Hoagland, a former NASA consultant and curator of astronomy and space science at the Springfield Science Museum in Springfield, Mass., was also a consultant to CBS News during the Apollo moon missions. He has spent decades looking into what he asserts is the truth about the numerous unmanned spacecraft missions as well as the manned Apollo voyages to the moon 40 years ago.

“The orbital photographs show us the scale of ancient ruins on the moon. And surface photography by the astronauts have shown remarkable, specific examples of anomalies that could only be explained through there being ancient remnants of some extraordinarily advanced technology,” he says.

In his book, “Dark Mission: The Secret History of NASA” (Feral House), co-written with Mike Bara, Hoagland alleges there are huge glass towers and domes on the moon that have produced repeated prismatic or rainbow effects on Apollo astronaut photographs available on NASA websites. He also claims numerous geometric ground features are evidence of ancient structures.

Stereo enlargements from two versions of the previous image show the “Castle” close up. Hoagland suggests this object is a remnant of an ancient alien structure. He notes what looks like a “sagging cable” at The Castle’s apex, left, at an estimated height of several miles above the lunar surface.

Read the full story and see the rest of the photos @ AOL News)