the world according to Americans.
Category:Geography portals
This is the top-level category for the portals related to geography. The main portal is Portal:Geography. Subcategories This category has the following 14 subcategories, out of 14 total. Pages in category "Geography portals" The following 10 pages are in this category, out of 10 total.
Ptolemy
2nd-century Roman mathematician, astronomer, geographer Unlike most ancient Greek mathematicians, Ptolemy's writings (foremost the Almagest) never ceased to be copied or commented upon, both in Late Antiquity and in the Middle Ages.[4] However, it is likely that only a few truly mastered the mathematics necessary to understand his works, as evidenced particularly by the many abridged and watered-down introductions to Ptolemy's astronomy that were popular among the Arabs and Byzantines alike.[5][6] Biography[edit] The 14th-century astronomer Theodore Meliteniotes gave his birthplace as the prominent Greek city Ptolemais Hermiou (Πτολεμαΐς Ἑρμείου) in the Thebaid (Θηβᾱΐς). Claudius Ptolemy died in Alexandria around 168.[11] Naming and nationality[edit] Engraving of a crowned Ptolemy being guided by Urania, from Margarita Philosophica by Gregor Reisch (1508), showing an early confluence between his person and the rulers of Ptolemaic Egypt. Astronomy[edit] Mathēmatikē Syntaxis[edit] Music[edit]
Geography
Geography Geography is more than maps. It's basic to any understanding of how to get from one place to another--in your head or on paper! Check out the links below to see how wide the world is. Basic Geography: The Equator and the Prime Meridian The earth is a globe, of course, and can be divided into lots of lines called latitude and longitude. Easter Island: Land of Giant Stones and Mysteries In the Pacific Ocean, thousands of miles away from the nearest population center, lies Easter Island, a strange and mysterious place famous for what happened there many years before and what kind of evidence has been left behind. The Ten Longest Rivers in the World You know the Nile River is the longest in the world, right? The River as Boundary For thousands of years, rivers have served as lines of division between civilizations, political entities, and religious groups. Bodies of Water Bodies of water have names that are sometimes similar and sometimes different. Next 1 2
CU-Boulder Geography
Portal:Forestry
From Wikipedia, the free encyclopedia A pine forest in Sweden Forestry is the science, art, and craft of creating, managing, using, conserving, and restoring forests and associated resources to meet desired goals, needs, and values for human benefit. Forestry is practiced in plantations and natural stands. The main goal of forestry is to create and implement systems that manage forests to provide environmental supplies and services. The challenge of forestry is to create systems that are socially accepted while sustaining the resource and any other resources that might be affected. Additional categories Purge server cache
Planisphaerium
The mathematician Claudius Ptolemy 'the Alexandrian' as imagined by a 16th-century artist Publication[edit] Herman of Carinthia, translator of Planisphaerium, with an astrolabe Originally written in Ancient Greek, Planisphaerium was one of many scientific works which survived from antiquity in Arabic translation. One reason why Planisphaerium attracted interest was that stereographic projection was the mathematical basis of the plane astrolabe, an instrument which was widely used in the medieval Islamic world. In the 12th century the work was translated from Arabic into Latin by Herman of Carinthia, who also translated commentaries by Maslamah Ibn Ahmad al-Majriti. Planisphere[edit] The word planisphere (Latin planisphaerium) was originally used in the second century by Ptolemy to describe the representation of a spherical Earth by a map drawn in the plane. [2] Planisphere References[edit] External links[edit] "Ptolemy on Astrolabes"
Book:Earth science
From Wikipedia, the free encyclopedia Overview Earth Earth science Earth's spheres Hydrosphere Biosphere Atmosphere Lithosphere Geosphere Pedosphere Cryosphere Magnetosphere Branches of earth science Geology Soil science Oceanography Geography Limnology Glaciology Atmospheric sciences
Almagest
Geometric construction used by Hipparchus in his determination of the distances to the sun and moon The Almagest (/ˈælməˌdʒɛst/) is a 2nd-century Greek-language mathematical and astronomical treatise on the apparent motions of the stars and planetary paths, written by Claudius Ptolemy (c. AD 100 – c. 170). One of the most influential scientific texts of all time, its geocentric model was accepted for more than 1200 years from its origin in Hellenistic Alexandria, in the medieval Byzantine and Islamic worlds, and in Western Europe through the Middle Ages and early Renaissance until Copernicus. The Almagest is the critical source of information on ancient Greek astronomy. It has also been valuable to students of mathematics because it documents the ancient Greek mathematician Hipparchus's work, which has been lost. An edition in Latin of the Almagestum in 1515 Ptolemy set up a public inscription at Canopus, Egypt, in 147 or 148. Names[edit] Contents[edit] Books[edit] Ptolemy's cosmos[edit]
