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Earth's movement along its nearly circular orbit while it is rotating once around its axis requires that Earth rotate slightly more than once relative to the fixed stars before the mean Sun can pass overhead again, even though it rotates only once (360°) relative to the mean Sun. [n 5] Multiplying the value in rad/s by Earth's equatorial ...
Quizlet was founded in 2005 by Andrew Sutherland as a studying tool to aid in memorization for his French class, which he claimed to have "aced". [ 6 ] [ 7 ] [ 8 ] Quizlet's blog, written mostly by Andrew in the earlier days of the company, claims it had reached 50,000 registered users in 252 days online. [ 9 ]
One complete orbit takes 365.256 days (1 sidereal year), during which time Earth has traveled 940 million km (584 million mi). [2] Ignoring the influence of other Solar System bodies, Earth's orbit, also called Earth's revolution, is an ellipse with the Earth–Sun barycenter as one focus with a current eccentricity of 0.0167. Since this value ...
The division of Earth by the Equator and the prime meridian Map roughly depicting the Eastern and Western hemispheres. In geography and cartography, hemispheres of Earth are any division of the globe into two equal halves (hemispheres), typically divided into northern and southern halves by the Equator and into western and eastern halves by the Prime meridian.
The Tabula Rogeriana, drawn by al-Idrisi in 1154 The Blue Marble photograph in its original orientation [1]. South-up map orientation is the orientation of a map with south up, at the top of the map, amounting to a 180-degree rotation of the map from the standard convention of north-up.
The Leitner system for scheduling flashcards was introduced by German scientific journalist Sebastian Leitner in the 1970s with his book, So lernt man lernen. [6] Later, the SuperMemo program and algorithm (specifically the SM-2 algorithm, which is the most popular in other programs) was introduced in 1987 by Polish researcher Piotr Woźniak. [7]
[2] Charting a world map requires global knowledge of the Earth, its oceans, and its continents. From prehistory through the Middle Ages, creating an accurate world map would have been impossible because less than half of Earth's coastlines and only a small fraction of its continental interiors were known to any culture.
Transcontinental country in Asia and Oceania, classified as a Southeastern Asian country by the United Nations Statistics Division: Indonesia (Maluku Islands and Western New Guinea). Entirely in Southeast Asia, but commonly associated with Oceania, and lying east of the biogeographical Wallace Line : East Timor .