If you want to know where you are, you need a good clock. The surprising connection between time and place is explored in Time and Navigation: The Untold Story of Getting from Here to There, the companion book to the National Air and Space Museum exhibition of the same name.

Today we use smartphones and GPS, but navigating has not always been so easy. The oldest "clock" is Earth itself, and the oldest means of keeping time came from observing changes in the sky. Early mariners like the Vikings accomplished amazing feats of navigation without using clocks at all. Pioneering seafarers in the Age of Exploration used dead reckoning and celestial navigation; later innovations such as sextants and marine chronometers honed these techniques by measuring latitude and longitude. When explorers turned their sights to the skies, they built on what had been learned at sea. For example, Charles Lindbergh used a bubble sextant on his record-breaking flights. World War II led to the development of new flight technologies, notably radio navigation, since celestial navigation was not suited for all-weather military operations. These forms of navigation were extended and enhanced when explorers began guiding spacecraft into space and across the solar system. Astronauts combined celestial navigation technology with radio transmissions. The development of the atomic clock revolutionized space flight because it could measure billionths of a second, thereby allowing mission teams to navigate more accurately. Scientists and engineers applied these technologies to navigation on earth to develop space-based time and navigation services such as GPS that is used every day by people from all walks of life.

While the history of navigation is one of constant change and innovation, it is also one of remarkable continuity. Time and Navigation tells the story of navigation to help us understand where we have been and how we got there so that we can understand where we are going.

�ber die Autorin bzw. den Autor

ANDREW K. JOHNSTON is a geographer at the National Air and Space Museum, where he researches earth science and environmental change and performs outreach on earth and space science. ROGER D. CONNOR is curator of instruments and avionics at the National Air and Space Museum. CARLENE E. STEPHENS is the curator of timekeeping at the National Museum of American History. PAUL E. CERUZZI is the curator of aerospace electronics and computing at the National Air and Space Museum.

The Smithsonian’s National Air and Space Museum possesses one of the largest collections of aviation and space artifacts in the world. The Smithsonian’s National Museum of American History explores the richness and complexity of the nation’s history. Both museums welcome millions of visitors a year, making them among the most visited museums in the world.

��ber diesen Titel� kann sich auf eine andere Ausgabe dieses Titels beziehen.

Anbieterinformationen

With 3 stores less than 1 hour outside the DC/Metropolitan area (1 in Gaithersburg, 1 in Frederick and 1 in Hagerstown, MD), we have the largest selection of books in the tri-state area. Wonder Book and Video has been in business since 1980 and online since 1997. We have over 1 Million books for sale on our website and another 1 Million books for sale in our 3 locations. Items on Abe are not necessarily in stock at our retail locations. Please do not call the stores to place orders for Abe Books sales. We have a very active online inventory and as such, we can receive multiple orders for the same item. We fill those orders on a first come first serve basis, but will refund promptly any items that are out of stock. Since 1980 it has always been about the books. ALL kinds of books from 95 cent children's paperbacks to five figure rare and collectibles. A merging of the old and new is where we started, and it is where we are today. Our retail stores have always been places where a reader can rush in looking for a title needed for a term paper that is due the next day, or where bibliophiles can get lost "in the stacks" for as long as they wish. In 2002 USAToday recognized us as "1 of 10 Great Old Bookstores", and we have been featured in numerous other newspaper and TV stories including Washington Post and CSpan. Members ABAA, ILAB.

Zur Homepage des Verk�ufers

Verbandsmitglied

Verbandsmitglieder verpflichten sich, h�chste Standards einzuhalten. Sie garantieren die Echtheit aller zum Verkauf angebotenen Objekte. Ihre Objektbeschreibungen sind sachkundig und genau, etwaig vorhandene M�ngel oder Restaurationen werden offengelegt. Die Ansetzung der Verkaufspreise erfolgt nach akkurater Recherche. Alle Verk�ufe werden stets fair und redlich abgewickelt.

Unternehmensdaten des Verk�ufers

Wonder Book
Wonder Book and Video, 1550 Tilco Drive, Frederick, MD, 21704, U.S.A.

Gesch�ftsbedingungen und Versandinformationen

Verkaufsbedingungen

We want you to be satisfied with the book you order. Our general description is
conservative and the book should be as good or better than our general
description
may indicate.

As we often get many requests for the same book, in some cases the book may
already be sold. We will email you regarding the availability.

RETURNS are cheerfully accepted up to 30 days. We ship out within 1-2 business
days and U.S. Standard Shipments usually arrive within 6-9 business days,
Priority 3-6. We want you to be...

Mehr Information

Widerrufsbelehrung

Versandbedingungen

STANDARD DOMESTIC U.S. SHIPPING IS FREE. Priority Shipping is only $6.99 for first item, $1 each additional. Orders ship within 2 business days. Shipping outside of U.S. is typically between $8-13 and takes between 8-15 business days. Heavier books may require additional shipping. Faster Needs Please Inquire.

Versandkosten von USA nach Deutschland

Versandkosten von USA nach Deutschland
Bestellmenge	7 bis 15�Werktage	4 bis 9�Werktage
Erster Artikel	EUR 21.30	EUR 85.18

Die Versandzeiten werden von den Verk�uferinnen und Verk�ufern festgelegt. Sie variieren je nach Versanddienstleister und Standort. Sendungen, die den Zoll passieren, k�nnen Verz�gerungen unterliegen. Eventuell anfallende Abgaben oder Geb�hren sind von der K�uferin bzw. dem K�ufer zu tragen. Die Verk�uferin bzw. der Verk�ufer kann Sie bez�glich zus�tzlicher Versandkosten kontaktieren, um einen m�glichen Anstieg der Versandkosten f�r Ihre Artikel auszugleichen.