![1girl absurdres arm_support bare_shoulders bottle cup dark detached_sleeves dragon_girl dragon_horns dragon_tail drinking_glass earrings expressionless eyelashes fantasy floating floating_object fom_(lifotai) frown gears globe gloves green_eyes head_rest high_heels highres horns hourglass jewelry light_bulb lips long_hair looking_at_viewer looking_to_the_side night night_sky original planetarium scenery signature silver_hair sky solo star_(sky) surreal table tail telescope thighhighs white_legwear rating:s score:9 1girl absurdres arm_support bare_shoulders bottle cup dark detached_sleeves dragon_girl dragon_horns dragon_tail drinking_glass earrings expressionless eyelashes fantasy floating floating_object fom_(lifotai) frown gears globe gloves green_eyes head_rest high_heels highres horns hourglass jewelry light_bulb lips long_hair looking_at_viewer looking_to_the_side night night_sky original planetarium scenery signature silver_hair sky solo star_(sky) surreal table tail telescope thighhighs white_legwear](/cdn_image/preview/12/38/1238e94c278a040938a56656f74b3c84.jpg)
A planetarium (plural planetaria or planetariums) is a theater built primarily for presenting educational and entertaining shows about astronomy and the night sky, or for training in celestial navigation. A dominant feature of most planetaria is the large dome-shaped projection screen onto which scenes of stars, planets and other celestial objects can be made to appear and move realistically to simulate the complex "motions of the heavens".
Can also be used to describe an object that projects star-like lights on a surface (such as the ceiling).