Chart of the Heavens
These charts by Mark B. Peterson and Wil Tirion are simple to use at any time of the year, from anywhere in the world. They include detailed instructions, information, and advice to help you fully understand the stars and constellations. Laminated for durability.
Online Purchase Policies
No warranty is provided for items purchased online unless specifically mentioned in the item description above. However, any item purchased here online can be exchanged within 30 days if it is defective. Purchaser is responsible for return shipping and must receive an RMA number before returning a defective item. Otherwise no returns are accepted for online purchases.
Orders usually ship within 3 business days and are shipped by USPS or UPS. Transit time is typically 7-10 days.
Wow! The Digitalis projector is a true innovation for portable planetaria. It is compact, one-piece and easily transported -- no more multiple cylinders, no more tiny planet pieces or moon magnets. The software it contains increases a hundredfold (maybe more) the capacity of topics we can do in the portable planetarium... Thank you, Digitalis!
— Elizabeth Wiles, (formerly at) Pacific Science Center, Seattle, WA