Answer:

orreries

Answer	Crossword Clue
ORRERIES	Solar-system models
ORRERIES	Planetariums
ORRERIES	Astronomers' apparatuses

ORRERIES	Astronomical models
ORRERIES	Planetary models
ORRERIES	Mini-planetariums
ORRERIES	Solar system models

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.