laying by pool at around 10-11 at night when i pointed to the sky and a green blue glowing object fell out of sky caught it self, left.

It was around 10-11 at night while i was laying by the pool with my feet in the water when i noticed a star was moving odd and i pointed it out to my younger cousin she sat up and said you know what you're right. I then agreed to her agreeing with me and laid back down. Now she's not paying attention and I'm still looking at the stars when a disc like object that was blue in the middle and green around the edges that was glowing fell out of the sky and then lifted back up almost like it caught itself from falling. started to hover away and in like 2 seconds it was gone. it was the fastest moving thing I've ever seen in my life. My grandmother and all of her friends were sitting outside as well and when I got up and went to them they notice I had tears in my eyes and was in shock and I told them what happened they all seemed normal about it like they didn't believe me. But my younger cousin who was beside me said she saw a glims of it while it started to hover away. It made no sound felt no wind from it and it left no trail. Whole thing felt like it was in slow motion I didn't believe what I had saw.