10-, 11- & 12-LETTER WORDS
'(<a href="http://www.j-archive.com/media/2005-06-10_J_09.jpg" target="_blank">Cheryl of the Clue Crew reports from Chicago's Adler Astronomy Museum.</a>) Built in 1913, the Atwood Sphere is an early one of these, which created a night sky using points of light  instead of a projector'
a planetarium