Doctor Greer's Close Encounters

Doctor greer reports seeing a dear eyed alien that is apparently meant to be an extra terrestrial with large, dark eyes. He says this would be the first of what he calls close encounters of the fifth kind, or c e five experiences. The astronomer and euphologist, j allan heinek in his 19 72 book, the u f o experience, a scientific inquiry. People aren't usually familiar with tethree types of distant encounters. What are they? First are nocturnal lights, just the typical reports of distant lights in the night sky. Next, the second type of distant encounter was daylight disks, which were u f o seen in the daytime,. And the third kind