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Children's

Global Mapping Planisphere Northern Hemisphere

Milky Way or Galaxy?.. That is the question...thou art both so scrumptious! Is it nobler in the mind to eat both?

  • Perfect introduction to the constellations
  • Gives an appreciation of the grand scale of the universe

Description

Global Mapping's Planisphere for the Northern Hemisphere is an absolutely perfect gift for newcomers and experienced users alike. It is possibly the most useful and inexpensive tool for navigating the night sky available.

Instructions for use:- First simply turn the Planisphere until the currrent time is at the top. Then twist the "Time" dial so that the current time of day is aligned with the current date (shown on the concentric "Date" dial). The planisphere's window then displays a view of the night sky as it would be seen at that particular moment. No more searching around the sky for a constellation which is not visible at that moment! 

A problem with many planisphere designs is that the shape of constellation patterns near the horizon is different on the map from what is visible in the sky, this is due to distortion from trying to make a domed shape into a flat picture.

For example, the constellation Scorpius (the Scorpion) is elongated on a typical planisphere, whereas on the Global Mapping Planisphere the distortion has been greatly reduced by gradually increasing the map's scale in the north-south direction.

Of course, a certain amount of distortion will always be present; whenever large areas of the dome-shaped sky-as on a planisphere-are mapped to a flat sheet of paper. The same distortion that affects constellation shape also makes the circular horizon line to appear oval. On the other hand, the Global Mapping Planisphere's horizon is round-just as observed outdoors.

Other outstanding features of the Global Mapping Planisphere include: Usability at all mid-northern latitude locations. Symbols and representations to help find and identify constellations, bright stars, the Milky Way, star clusters, nebulae (gas clouds), variable stars and galaxies. Main Messier objects are numbered. A target marker indicating the overhead point. Labels for both Standard and Daylight Savings Time. Star-hopping diagrams that clearly point the way to several prominent stars and constellations. Instructions for use and object descriptions are provided in a manner that newcomers to astronomy will find easy to understand. Constellation, Bright Star and Binocular Object tables that provide a wealth of additional data to make the Planisphere useful for years on end.

Designed by Mark B. Peterson; former Curator of Gates Planetarium at the Denver Museum of Nature and Science, who is a published author with a passion for astronomy, and a keen interest in star maps.

our price £9.99

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