Planet Earth Day/Night Globe. National Geographic. 14" diameter. Brass base. Double meridian. Illuminated. Developed by the National Geographic Society. This illuminated, fully digital, 14" diameter globe shows day, night, and zones of twilight for any location, time, and date in the world. Have you ever wanted to actually see how Alaska experiences complete days in darkness or daylight? Have you ever wondered why the International Dateline has such significance in the business world? The National Geographic Planet Earth can answer these questions and many more. With the light off the 14" diameter globe shows the political map of the world. When the light is on, it shows the physical features of the world and displays the earth in colorful relief - but that's not all. This unique educational tool also shows day and nighttime for any time, date, and location in the world throughout the four seasons. It can be manually adjusted both forward and backward to see past, present, and future hours of daylight and darkness for easy demonstration and understanding. A pinpoint light shows the actual location of the sun throughout the year. Unique "twilight rings" depict the three zones of dawn and dusk. The superb design and engineering, combined with the expert cartography of National Geographic creates a learning tool that is fun and easy to use. The globe has an overall height of 17 inches. . This stunning combination of cartography and science is virtually unbreakable, and the electrical cord is discretely hidden in the matte brass base. Comes complete with a detailed instruction booklet and Certificate of Authenticity. This is our most popular National Geographic globe!