Silver sphere with short transparent tail
I was standing in the street looking at the stars and suddenly the silver sphere (golfball size) popped up from behind the building (100 ft). It flew so smoothly without any noise. I started screaming and pointing to it but people were staring at me instead of looking up. Only my daughter followed me and saw it. I might think it was some kind of drone but it had trasparent tail!!! It happened in 2013. My son saw the silver sphere glowing with bluish light above his head in 2018 but it was a bit bigger (basketball size).
That was amazing! We were so impressed! Somebody is watching us. These objects seem like reconnaissance vehicles!