I am posting this now because I still have no explanation for what I saw last Christmas. I was at a clinic in Andernach and observed this object while looking outside. ​Unlike a plane or satellite, this object was completely stationary (standing still) in the sky. It wasn't just a steady light; it was pulsating rhythmically. It didn't make any sound. ​I recorded a video, and this is a screenshot from that footage. Given the holiday, I thought maybe a drone or lantern, but it was too stable an...