celestial planisphere with undistorted constellations, 35°N
Date: 1993
Inventory Number: 2000-1-0022
Classification: Planisphere
Subject:
Inventor: Milton D. Heifetz (born 1921)
Supplier: Learning Technologies Inc. (fl. 1997 - 2007)
Cultural Region:
Place of Origin:
Dimensions:
23.3 × 22 × 0.1 cm (9 3/16 × 8 11/16 × 1/16 in.)
box: 4 × 37.8 × 30 cm (1 9/16 × 14 7/8 × 11 13/16 in.)
Description:
This is standard celestial planisphere for latitude 35 degrees, except that the projections of the constellations themselves are undistorted.
The celestial map is printed on a plastic base. It shows constellations, the Milky Way, principal celestial circles, and stars of different magnitudes. The limb of the base is marked with the civil calendar.
The clear plastic volvelle on top of the star map is rotates concentrically to the star map. It marked with the projection of the horizon. Around the limb are hours.
The reverse side of the planisphere is printed with instructions for its use.
The celestial map is printed on a plastic base. It shows constellations, the Milky Way, principal celestial circles, and stars of different magnitudes. The limb of the base is marked with the civil calendar.
The clear plastic volvelle on top of the star map is rotates concentrically to the star map. It marked with the projection of the horizon. Around the limb are hours.
The reverse side of the planisphere is printed with instructions for its use.
Signedon reverse: © 1993 Milton D. Heifetz, Mfd. by Datalizer Slide Charts, Inc., Addison, IL 60101
on sticker on reverse: Learning Technologies, Inc. / 1-800-537-8703 / Somerville, Massachusetts, USA
on sticker on reverse: Learning Technologies, Inc. / 1-800-537-8703 / Somerville, Massachusetts, USA
Inscribedon front of planisphere: HEIFETZ PLANISPHERE / WITH / UNDISTORTED IMAGES OF CONSTELLATIONS / 35° LATITUDE
on reverse of planisphere: HEIFETZ PLANISPHERE / PRINCIPLES AND INSTRUCTIONS
on reverse of planisphere: HEIFETZ PLANISPHERE / PRINCIPLES AND INSTRUCTIONS
Curatorial RemarksStored in box with other Heifetz planispheres.
ProvenancePurchased by CHSI from Learning Technologies, Inc., Somerville, MA, 2000.