Here on page 544 of the Sears 1969 Christmas Wish Book is a home planetarium setup. The 7" diameter star projector had over 60 constellations. For an extra $19.99 you could buy a plastic hemispherical dome that would actually make the star projector useful.
According to the U.S. Bureau of Labor Statistics' inflation calculator, the total cost of the star projector and dome ($35.98 in 1969) would equal $224.61 in 2012 money.
Home Planetarium from the 1969 Sears Christmas Wish Book
Posted September 9, 2012