sarongsong
16-October-2006, 07:57 AM
As simple and inexpensive as it gets:Experiment with each element of a simple 16-power refracting telescope and see how the lenses work when put together without using an optical bench...similar to Galileo’s...$9.00... Learning Technologies (http://www.starlab.com/pstelescope.html#Anchor-Activity-49575)and for $48,491 more, their:Digital STARLAB is a compact, manually-operated, user-friendly planetarium projection system...System only (no dome): $48,500... Learning Technologies (http://www.starlab.com/slds.html)