Question

what is nocticlucent clouds

Answer 1

Noctilucent clouds, or night shining clouds, are tenuous cloud-like phenomena in the upper atmosphere of Earth. They consist of ice crystals and are only visible during astronomical twilight. Noctilucent roughly means "night shining" in Latin.

Answer 2

the noctilucent observed slightly below the MS Office are the highest cloud in the earth atmosphere at 83 km