indefinite
indistinct
Cynthian
abstract
amorphous
anagalactic
asteroidal
astral
astrologic
astrologistic
astrologous
astronomic
astrophysical
bland
blind
blurred
broad
castellatus
celestial
circumplanetary
cirrose
cirrous
cislunar
clear as mud
cloud-flecked
clouded
cloudlike
cloudy
collective
cumuliform
cumulous
dark
dim
dirty
empyreal
empyrean
equinoctial
extragalactic
faint
featureless
foggy
fuzzy
galactic
general
generalized
generic
gloomy
hazy
heavenly
heavy
nebula
nebular
nebulosity
ethereal
formless
ghostly
grayish
ill-defined
illusory
insubstantial
milky
murky
phosphorescent
shadowy
shapeless
undefined
unfocused
unreal