Noctilucent clouds are beautiful in person. I saw one once that was a result of the residual contrail from a Saturn 5 rocket. I went to work one mourning in Boca Raton Florida. I got out of the car and looked up to the East North East Sky (Cape Canaveral) and saw this.
I was a litte freaked out because when I saw it, it was against a pitch black 5:30am night sky and was very luminescent. It looked just like a Hubble Space Telescope picture of a nebula. I had to do some research to discover what it was. It was the ice crystals left behind by the exhaust of a rocket. It was high enough in the atmosphere that it cought the light that was about to come over the horizon before it actually did. I did not take the picture. I found it on NASA's web site the next day.