Answer: moons

AnswerCrossword Clue
MOONS

Stares absent-mindedly

MOONS

Io and Callisto

MOONS

Orbiters of orbiters

MOONS
Indulges in reverie
MOONS
Phobos and Deimos, e.g.
MOONSStares wistfully into space
MOONSMany of Uranus's are named after Shakespearean characters
MOONSMercury and Venus lack them
MOONSMars pair
MOONSPlanet orbiters
MOONSPlanetary orbiters
MOONSSatellites
MOONSJupiter's Io and Callisto
MOONSGanymede and Europa
MOONSBrings up the rear?
MOONSButts out?
MOONSSome Lucky Charms marshmallow shapes
MOONSPeriods of time
MOONSNew and blue
MOONSDaydreams
MOONSLooks longingly
MOONSPlanetary satellites
MOONSMars' pair
MOONSTitania and Oberon, e.g.
MOONSPlanet circlers
MOONSMars' twosome
MOONSGazes dreamily
MOONSSaturn's 31
MOONSNatural satellites
MOONSEuropa and Callisto
MOONSThey circle Saturn
MOONSAstronomer's sightings
MOONSMercury's lack
MOONSDeimos and Phobos, to Mars
MOONSGanymede and Lysithea, to Jupiter
MOONSPhoebe and Rhea, to Saturn
MOONSResponds to "Bottoms up!"?
MOONSMonths.
MOONSSecondary planets.
MOONSActs lovesick.