Uncle Milton has been making science toys in the United States since the Ant Farm days, and Star Theater Pro is its long running home planetarium: a battery powered projector with a rotating dome, constellation discs for the night sky and a set of astronomy images, aimed squarely at children who ask questions faster than adults can answer them. The projection covers a child's bedroom ceiling, and the rotation speed imitates the turning of the sky through the night.
Optics are plastic and the resolution is modest, so this is a teaching aid rather than a device for quiet stargazing by an adult. Stock has become patchy over the years and prices on resale sites vary widely, which is worth checking before ordering. For a school project or a birthday present it still does the job it was designed for.
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