nebulosity

It answers in fact fully to the E. word rack, Indicating atmospheric nebulosity; hence Ragnarok is very approp.

By going back as far as possible, we thus arrive at a nebulosity so diffused that its existence could hardly be suspected.

There are bristling comets, they are like the skins of beasts with their hair on, and are surrounded by a nebulosity.

A later writer on astronomy said that the substance of the nebulosity and the tail is of almost inconceivable tenuity.

They ranged from a faint trace of extensive diffuse nebulosity to a nebulous star with a mere vestige of cloudiness.