Celestial bodies (6)
'celestial bodies' is the definition.
(comet is a kind of celestial body)
This is the entire clue.
(Other definitions for comets that I've seen before include "Space travellers" , "Heavenly bodies with tails" , "Small extraterrestrial bodies" .)
'celestial bodies' is the definition.
(asteroid is a kind of celestial body)
This is the entire clue.
(Other definitions for asteroids that I've seen before include "Small celestial bodies that move around the sun" , "Heavenly bodies" , "Small planets orbiting the sun" , "Do satires address small planets?" , "lumps of rock" .)