Answer:

URSA

Answer	Crossword Clue
URSA	Bear in the sky
URSA	Celestial bear
URSA	Astronomical bear

URSA	Brutus's bear
URSA	Polar bear name
URSA	.. Major
URSA	Bear in the sky?
URSA	Major constellation?
URSA	Bear in the air
URSA	Major or Minor
URSA	... Major

URSA	Bear with us at night
URSA	Major constellation
URSA	Bear (Lat.)
URSA	Bear up there
URSA	Heavenly bear
URSA	Bear up there?
URSA	Sky bear
URSA	Cosmological bear

URSA	Bear, to Brutus
URSA	Bear up?
URSA	Major in astronomy?
URSA	Bear, to Boethius
URSA	Word in two constellation names
URSA	... Minor (northern constellation)
URSA	Bear among the stars
URSA	Bear in a constellation

URSA	... Minor
URSA	Bear people look up to
URSA	Minor leader?
URSA	Stellar bear
URSA	Constellation bear
URSA	Major leader?
URSA	Minor beginning
URSA	Nocturnal bear

URSA	Minor opening?
URSA	Bear over the air
URSA	Heavenly beast
URSA	Major opening?
URSA	.. Minor