Select Your Latitude
The 4th Day Alliance only carries the Night Sky Planisphere for two different latitudes that cover the majority of the United States. We carry the Planisphere for:

30 - 40 degree zone
40 - 50 degree zone

You can determine your latitude to make sure you get the right planisphere by clicking on the map below:

US Map zoom

Order Now

The Night Sky Planisphere

The Night Sky: A New Kind of Planisphere
  • "Chandler's planisphere (rotating star-finder wheel) is the finest available." - Sky News
  • "The Night Sky is not just another planisphere. I think The Night Sky is the finest and easiest to use star finding aid in existence." - Jack Horkheimer: Star Gazer

The Distortion Solution!

Conventional planispheres severely distort the sky near the southern horizon. The distortion results from trying to stretch the whole dome of the sky onto a single flat map. Below is the constellation Sagittarius (photo courtesy of John Sanford):
Stacks Image 1317
Below are the images of Sagittarius shown on conventional planispheres (left image) and then on the Night Sky Planisphere (right). The distortion is gone!
Stacks Image 1318
Stacks Image 1319

The Night Sky is NOT a conventional planisphere! No flat map can remove all distortion, but The Night Sky eliminates over 90% of the distortion inherent in conventional 1-sided planispheres.

The Night Sky is Designed to be Used!

  • Unlike coffee-table planispheres, The Night Sky is printed with dark stars on a light background, for easy nighttime readability.
  • The constellations are drawn simply, emphasizing the brighter stars. (The constellation patterns were designed in collaboration with the editors of Sky and Telescope magazine.)
  • Coordinate grid lines are shown without being intrusive. Coordinates are shown because they can be useful for cross referencing with star atlases.
  • A selection of deep sky objects for binocular viewing is included. It is important to point out to beginners that the best first telescope is a pair of binoculars. You may already have what it takes to start observing tonight!
  • The Night Sky is larger than it looks! The map scale is larger than on similar-size planispheres because the whole sky does not have to be shown on a single map. Even the 5" pocket version is large enough to be quite readable.

Sky and Telescope Magazine adopted The Night Sky in 1976 and has promoted it ever since. The Night Sky is widely recognized by the amateur astronomy and educational communities as the overall best planisphere on the market.