saw a bright plane shaped object high in the sky

I heard a student say "what's that" looking up. I looked up and saw a shiny plane looking object. I didn't look like the planes I've seen before. I took my phone and scanned the sky till i saw a bright object. I took a picture. It looked just like a bright dot. When I enlarged the picture I could see what what looked like the tail and nose of a plane with a blue donut around the middle. No wings could be seen. when I looked up again the plane was gone. There were no sounds.