Science: Homemade Sky

For the benefit of fascinated multitudes in four of the biggest U. S. cities—Chicago, Philadelphia, New York, Los Angeles — planetaria project artificial stars on artificial skies by means of big, complicated, dumbbell-shaped projectors, made by Zeiss and imported from Germany. Present price of a Zeiss instrument is around $130,000.

Unveiled last week in Springfield, Mass., was a homebuilt projector which cost less than $12,000. It was built by able, earnest Frank Korkosz, technician of Springfield's Museum of Natural History. Not dumbbell-shaped but spherical, the Korkosz instrument projects on a 40-ft. (diameter) hemispherical ceiling...

Want the full story?

Subscribe Now


Get TIME the way you want it

  • One Week Digital Pass — $4.99
  • Monthly Pay-As-You-Go DIGITAL ACCESS$2.99
  • One Year ALL ACCESSJust $30!   Best Deal!
    Print Magazine + Digital Edition + Subscriber-only Content on

Learn more about the benefits of being a TIME subscriber

If you are already a subscriber sign up — registration is free!