Answer: nebula

AnswerCrossword Clue
NEBULACloudlike patch seen at night
NEBULACloud of gas and dust
NEBULASci-fi author's award
NEBULAObservatory sighting
NEBULACrab ...
NEBULASpiral ...
NEBULAMount Palomar sighting
NEBULACloud of interstellar gas or dust
NEBULAGalactic mass
NEBULADistant cloud
NEBULACloudlike patch in the night sky
NEBULAAstronomer's subject
NEBULACloudlike mass
NEBULASky sight
NEBULAAstronomer's concern.
NEBULACelestial phenomenon.
NEBULAMilky way.
NEBULACelestial structure.
NEBULAInterstellar matter
NEBULABirthplace of many stars
NEBULAPart of a galaxy
NEBULAOrion ...
NEBULACloud in space
NEBULACloud of interstellar gas and dust
NEBULADistant cloud?
NEBULAInterstellar gas cloud
NEBULACelestial cloud
NEBULASci-Fi award
NEBULAAward won by Asimov, Herbert and Le Guin
NEBULA... Awards (annual prizes for science fiction and fantasy)
NEBULAAnnual science fiction award
nebulaa cloud-like interstellar mass
nebulaluminous mass of gas or stars
NEBULACosmic cloud
NEBULACloud of dust and gas in space
NEBULAPossible outcome of a supernova explosion
NEBULAAstronomer's sighting
NEBULACrab, for one
NEBULAVery, very, very distant cloud
NEBULASpace spiral