Mystery pcb board

Memory card with enough storage to hold the word "the" Possibly from NASA, this 31" double sided copper PCB made into a coffee table has no markings and was gifted to my grandmother in the early 70's by a doctor from Massachusetts. The dark polymer sections glow orange when illuminated from behind. The five dimples on the underside are hollow and the center one appears slightly burned inside. I was holding it up to my face looking through the center hole while my girlfriend held a light to the other side so I could get a good look through. She suddenly ran the light around the perimeter and it shocked me. I told my mother about that incident and she blurted out it's from NASA. I've since contacted many historians and keep being sent to the next guy up the chain. The only person that hasn't responded to my inquiry is the director of the national aerospace museum in DC. Everything has a story and I've been searching for the history of this since I first saw it in my grandmother's party room back in 1990.