WebSince the Earth is flattened at the poles and bulges at the equator, geodesy represents Earth's shape with an oblate spheroid. The oblate spheroid, or oblate ellipsoid, is an ellipsoid of revolution obtained by rotating an ellipse about its shorter axis. It is the regular geometric shape that most nearly approximates the shape of the Earth. WebJan 31, 2024 · r r — Earth's radius, equal to 3959 miles or 6371 km. This equation can be derived using the Pythagorean theorem. You can try to derive it yourself – it is not that …
What is the difference between a nautical mile and a knot?
WebUnderstanding the circumference of the earth is important for many reasons, including navigation, planning for space missions, and measuring distances around the globe. ... Eratosthenes was able to calculate that Earth’s circumference was 40,010 km (24,902 miles). This number is remarkably close to modern calculations which put Earth’s ... WebMeasured at the equator, the Earth has a circumference of 40,075.017 km or 24,901.461 miles. But measured from pole to pole, that is to say, along the meridian line, the Earth has a... northbourne garage
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Earth's circumference is the distance around Earth. Measured around the Equator, it is 40,075.017 km (24,901.461 mi). Measured around the poles, the circumference is 40,007.863 km (24,859.734 mi). Measurement of Earth's circumference has been important to navigation since ancient times. The first known … See more Eratosthenes The measure of Earth's circumference is the most famous among the results obtained by Eratosthenes, who estimated that the meridian has a length of 252,000 stadia, … See more • Earth radius • Spherical Earth • Nautical mile See more • Carl Sagan demonstrates how Eratosthenes determined that the Earth was round and the approximate circumference See more In 1617 the Dutch scientist Willebrord Snellius assessed the circumference of the Earth at 24,630 Roman miles (24,024 statute miles). Around that time British mathematician Edmund Gunter improved navigational tools including a new quadrant to determine … See more • Krebs, Robert E.; Krebs, Carolyn A. (2003). "Calculating the Earth's Circumference". Groundbreaking Scientific Experiments, Inventions, and Discoveries of the Ancient … See more WebNautical miles are used to measure the distance traveled through the water. A nautical mile is slightly longer than a mile on land, equaling 1.1508 land-measured (or statute) miles (1.852 kilometers). The nautical mile is based on the Earth’s longitude and latitude coordinates, with one nautical mile equaling one minute of latitude. Knots are used to … northbourne events