#3 The Age of Exploration was when many sailing vessels set out to conquer or explore new territories, and the wealth of nations floated upon the oceans. To find your latitude, you only need to know the length of the day or the height of the sun above the horizon, whereas to find your longitude, you need to know what time it is aboard ship and the time at your home port or another place of known longitude. #2 The difference between latitude and longitude is that the zero-degree parallel of latitude is fixed by the laws of nature, while the zero-degree meridian of longitude shifts like the sands of time. They were first mapped out by Ptolemy in his first world atlas in AD 150. Sample Book Insights: #1 The latitude and longitude lines govern the world today, as they have for centuries. The asteroid 30935 Davasobel is named for her.Please note: This is a companion version & not the original book. In her four decades as a science journalist she has written for many magazines, including Audubon, Discover, Life and The New Yorker, served as a contributing editor to Harvard Magazine and Omni, and co-authored five books, including Is Anyone Out There? with astronomer Frank Drake. She holds honorary doctor of letters degrees from the University of Bath, in England, and Middlebury College, Vermont, both awarded in 2002. Sobel attended Antioch College and the City College of New York before receiving her bachelor of arts degree from the State University of New York at Binghamton in 1969. A 1964 graduate of the Bronx High School of Science, Ms. Her most well kno Dava Sobel is an accomplished writer of popular expositions of scientific topics.

Dava Sobel is an accomplished writer of popular expositions of scientific topics.

Longitude dava