Answer: nebulas

AnswerCrossword Clue
NEBULASSupernova fallouts
NEBULASInterstellar dust clouds
NEBULASFantasy writers' awards
NEBULASSpace clouds
NEBULASClouds of interstellar dust
NEBULASCelestial structures in gaseous state.
NEBULASCrab and Horsehead
NEBULASGalaxies
NEBULASSupernova remnants
NEBULASVery distant clouds
nebulasluminous mass of gas or stars
nebulasNEBULA, a cloud-like interstellar mass