what is the circumference of the earth

With a circumference of 40,075 km, Earth is the fifth largest of the planets in the Solar System. Earth's rocky mantle and metallic core make it the densest planet . From this he calculated the circumference which he determined to be 250,000 stadia (39,375 kms to 46,250 kms depending on . Multiply the square by π, or 3.14 for an estimation. 3,950 miles (6,356 km) is one of Earth's two polar radiuses, 12 miles (22 km) apart from one another as a radius, diameter, and circumference. Eratosthenes estimated Earth's circumference at about 46,250 kilometers (28,735 miles). hope it helps This is the distance around the equator of the Earth. In calculating the circumference of the earth along this latitude it has to be assumed the earth is perfectly spherical and using the formula C =2πr, where C is the circumference and r the radius. Using elegant mathematical reasoning and limited empirical measurement, in approximately 240 b.c., Eratosthenes of Cyrene (276-194 b.c.) So, if 804 km or 500 mi. How big is Earth? Earth's circumference is the distance around Earth. Asteroid 2022 EB5's discovery marks the fifth time an asteroid has been observed before hitting Earth's atmosphere. Mathematicians of his time had estimated Earth's circumference to be "400,000 stadia", or 62,880-66,680km (39,000-41,500 miles), depending on how stadia are converted to modern metric units. It is about 25,000 miles around the Earth, or about 8 times the New York to Los Angeles distance, and a little less than 100 times . Earth's name in English, the international language of astronomy, derives from Old English and Germanic words for . It is about 3,000 miles from New York to Los Angeles, or about 10 times the Memphis to St. Louis distance. The difference is caused by the flattening of the poles, such that the Earth has an oblate spheroidal shape. where r is the radius and pi is about 3. (or 5,000 stadia for Eratosthenes) was 1/50th, multiplication gives you the earth's circumference: 500 mi. If a central angle with its vertex at the center of the earth has a measure of 1 degree, the arc on the surface of the earth that subtends the angle has a measure of 60 nautical miles. Its single most outstanding feature is that its near-surface environments are the only places in the universe known to harbour life. Written by: Erickson. If you slice the earth in half, look at the resulting circle and divide it into said degrees, minutes and seconds, you get: Circumference = 21,600 Nautical Miles (1° o. What I mean by this is that if the question has been posed in order to get assistance w. Circumference of the Earth It is about 280 miles, or a bit over 400 kilometers, from Memphis to St. Louis. Objects that circle another object, another name for it is Centralized Pattern; For example, in an Islamic city, houses and public buildings may circle around the mosque, or house of worship. Today we know our planet's circumference is roughly 40,000 kilometers (24,850 miles). This shape, caused by the flattening at the poles, is called an oblate spheroid. Given this information, what is the circumference of the Earth? The Earth's orbit is roughly circular. 1 Earth Circumference to common length units; 1 Ec = 40000000 meters (m) 1 Ec = 40000 kilometers (km) 1 Ec = 4000000000 centimeters (cm) 1 Ec = 131233595.80052 feet (ft) The earth has a circumference of approximately 24,900 miles. Earth is the fifth-largest planet in the solar system. Eratosthenes-estimated Earth's circumference at about ( (46,250)) kilometerss (28,735 miles). Our Sun as close as it gets to a perfect sphere in nature. Get out a piece of paper and a calculator and see if you can work it out on your own. So in the case of the Earth's orbit, it is roughly: 2π ⋅ 150 million km ≈ 940 million km. So how do I get the diameter of the Earth1. What is the circumference of the earth in nautical miles? The circumference of the Earth in kilometers is 40,075 km, and the circumference of the Earth in miles is 24,901. Its single most outstanding feature is that its near-surface environments are the only places in the universe known to harbour life. The Earth's meridional circumference is 40,008 km, and its average circumference is 40,041 km. Earth has been called the "Goldilocks planet." Its diameter (the distance from one side to the other through Earth's center) is 7,926 miles (about 12,756 kilometers). Diameter To Circumference Earth's circumference (the distance all the way around the equator) is 24,901 miles (40,075 kilometers). Contrary to popular belief, Christopher Columbus did not discover that the Earth is round. For example, the ancient Greek unit of measuring length, "stadion", was based on the circumference of the average Greek stadium, but sports stadiums in Greece had a length of 607 ft while those in Egypt were 517 . Eratosthenes of Cyrene (/ ɛr ə ˈ t ɒ s θ ə n iː z /; Greek: Ἐρατοσθένης [eratostʰénɛːs]; c. 276 BC - c. 195/194 BC) was a Greek polymath: a mathematician, geographer, poet, astronomer, and music theorist.He was a man of learning, becoming the chief librarian at the Library of Alexandria.His work is comparable to what is now known as the study of geography, and he . So, the circumference is 2 x 6370 x 3.1415, which equals 40 029 km, or approximately 40 thousand kilometers. Measurement of Earth's circumference has been important to navigation since ancient times. At an altitude of 322 km (200 miles), an orbiter covers approximately 41,300 km (26,000 . Measured at the equator, the circumference of the Earth is 24,901.55 miles. takes approximately 90 minutes to orbit, or travel just outside the circumference of the Earth. The circumference of a circle is given by the formula 2πr where r is the radius. What Is The Circumference Of The Earth Nasa? Plato took a guess at Earth's circumference at 62,800-74,000 kilometers (or 39,250-46,250 miles) while Archimedes was closer with a guess of 55,500 kilometers, or 34,687 miles. You found the circle's area from the circumference. Diameter To Circumference Sources + Our Common Sources. geography. . And Earth is the third-closest planet to the sun. 804 km x 50 = 40,200 km. There are two different ways to do this: Method 1: use a protractor. (Although a spheri-cal Earth had been suggested 300 years earlier by Pythagoras, appar-ently for purely asthetic reasons, Eratosthenes provided the first geometric proof.) C = 360/7 x d (C: circumference of Earth, d: the distance between Syene and . Its diameter is about 8,000 miles. Method 1: Earth's circumference can be found out by using the geometric formula that was used over 2,000 years ago. The products of complex interactions between humans and their environments. Eratosthenes was astronomical knowledge, philosopher, mathematician and director of the Alexandria Library. 2. so 24000 mi = 2 x 3 x r = 6 x r. 3. therefore 24000 mi / 6 = r = 4000 mi. How to use circumference in a sentence. <p>You can figure out the earth's circumference using a geometric formula that's over 2,000 years old! The Earth 's mean distance from the sun is approximately 150 million kilometers. Only Mercury and Venus are closer. In other words, if you could drive your car around the equator of the Earth (yes . 5. so he performed his own measurement of the Earth's circumference and arrived at the figure of 18,000 miles (28,962 kilometers). Using this information we can calculate the circumference of the Earth as C = π x 12,742km = 40,030km. So, if one would know the distance between Syene and Alexandria, s/he could calculate the circumference of the Earth. Image: juliantrubin.com. circular pattern. NASA System Predicts Impact of Small Asteroid Scientists are using data from the air, land, and space to get a better idea of how climate change is affecting Earth's frozen regions. by TomCruise Emulous of fame Grand (167k points) Mark the end of the meter stick's shadow on the ground with a stick or a rock. How big is the Earth: Diameter, circumference, mass & volume explained. 4. the diameter of the earth is 2 x r = 8000 mi, where the diameter is 2 times the radius. Eratosthenes, the head librarian in Alexandria, Egypt, in 200 B.C. In relation to the base unit of [length] => (meters), 1 Earth Circumference (Ec) is equal to 40000000 meters, while 1 Nautical Miles (NM) = 1852 meters. Published on: March 5, 2022. Earth's name in English, the international language of astronomy, derives from Old English and Germanic words for . But over 2000 . Aristotle not only taught that Earth was spherical but also mentioned early estimates of Earth's circumference. At the equator, Earth has a circumference of 24.901.461 mi / 40.075.017 km. Earth's Circumference at the Equator: 24,901.55 miles (40,075.16 km) Earth's Circumference Between the North and South Poles: 24,859.82 miles (40,008 km) Notice that 39112.5miles does not = 24901 miles. made that discovery about 1,700 years before Columbus. View My Bookmarks. If the radius of the earth is 3960 regular (statute) miles, how many statue miles are in 1 nautical mile? The meaning of CIRCUMFERENCE is the perimeter of a circle. The flattened spherical nature of Earth is reflected in terms of its equatorial and meridional circumference. However, the Earth is not quite a perfect circle, and if you measure through the poles, the circumference is a bit shorter—24,859.82 miles. What is the exact circumference of the earth? See also: The Size of the Sun and Earth; Circumference Formula. ( ( 40,000 kilometers. The first known scientific measurement and calculation was . However, from pole-to-pole — the meridional circumference — Earth is only 24,860 miles (40,008 km) around. The meridional circumference that is from pole to pole is 40,008 km. Columbus used the circumference estimated by Posidonus when he . This value is about 20,000-25,000km . (40,008.6 km). circumference of Earth with remarkable accuracy. Both circumference formulas use the irrational number Pi, which is symbolized with the Greek letter, π. Pi is a mathematical constant and it is also the ratio of the circumference of a circle to the diameter. cultural landscapes. Eratosthenes correctly developed a formula for calculating the Earth's circumference, but his estimate included multiple errors. Based from those measurements, the Earth's equatorial circumference is about 24,901 miles (40,075 km). It is designated by the symbol ♁. One day Eratosthenes read in one of the books on the papyrus that there was no shadow at the stick-erected upright at noon on June 21 in the city of Syene near . Circumference Formula. Again, we know that C = πd, and that the diameter of the earth is 12,742km. Erastosthenes, a Greek scholar living in Egypt, observed . However, from pole to pole the meridional circumference of Earth is only 24,860 miles (40,008 km) around. The earth, as we said, is an oblate spheroid, so geodesists (scientists who measure the . View answer & additonal benefits from the . The equatorial circumference of the Earth is 40,075 km. The circumference of the Earth can be found by two methods. Earth's polar radius is 6,356 km or 3,950 miles which has a difference of 13 miles or 22 km. Eratosthenes thought the following way. Archimedes was the closest to guessing the accurate circumference of the Earth, which is 40,075 kilometers. IN Sky and Telescopetaking the schoinus as 12,000 royal cubits of 0-525 metres each, the length of the stadium was 516 o 73 ft It is designated by the symbol ♁. Answer (1 of 6): Let's use nautical miles, as they are actual terrestrial measurements based upon degrees, minutes, and seconds. The sun is 1 392 700 kilometers or 865 000 miles across compared to the Earth's diameter which is 12 742 km (7 918 mi). The Earth's diameter at the equator is 7,926.28 miles, and its diameter at the poles is 7,899.80 miles. The measurement of distance became increasingly important to ancient and classical civilizations as their territorial and cultural horizons expanded. At the equator, the diameter of the earth is roughly is roughly 12,760km and decreases progressively towards both the north and south poles. And for any of you ancient Greeks out there, 5,000 stadia x 50 = 250,000 stadia. By just holding up a yardstick at solar noon . -----How fast would you have to travel to see the sun set twice, or outrun the shadow of the setting sun? In 200 B.C. Eratosthenes worked out the circumference of the earth to be -----. Multiply the radius by itself to get its square. He . Learn vocabulary, terms, and more with flashcards, games, and other study tools. 1 mi = 1.6 km so 8000 mi x 1.6 km/mi = 12800 km Nevertheless, the diameter of the Earth still is the first step for us, the residents of this planet, in our attempt to understand the cosmic distance scale. A) 30,000 Km: B) 35,000 Km: C) 40,000 Km: D) 45,000 Km: Correct Answer: C) 40,000 Km: Part of solved Earth questions and answers : General Knowledge >> Geography >> Earth. Earth, third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. The Answer: At the equator, the Earth's circumference is 24,830 miles (40,000 km).-The Editors. I read about how Eratosthenes calculated the circumference of the Earth and I knew that I had to try it myself. In 200 B.C. Earth's circumference (the distance all the way around the equator) is 24,901 miles (40,075 kilometers). (40,076.5 km), and that the circumference about the poles is 24,860.2 mi. Diameter. What is the approximate equatorial circumference of the earth? The circumference of the earth at the equator is 24,901.55 miles (40,075.16 kilometers). Measured around the Equator, it is 40,075.017 km (24,901.461 mi). Eratosthenes (276-194 B.C.) Well, the difference in angle between these two cities is equal to 7.12°, which is 50.56 times less than a full circle. Those measurements, taken at a temperature of 4,085 degrees Fahrenheit …. The Earth is not a perfect sphere but rather an ellipsoid. To find the area of a circle from the circumference, follow these steps: Divide the circumference by π. Divide the result by 2 to get the circle's radius. Two formulas are used to find circumference, C, depending on the given information. Answer link. Two formulas are used to find circumference, C, depending on the given information. accurately measured the Earth's circumference. Start studying What is the circumference of the Earth?. Earth is the fifth-largest planet in the solar system and the densest. The circumference of the Earth that includes the Prime Meridian is a polar circumference measuring approximately 40,008 km (about 24,860 miles), which is shorter than the equatorial circumference . This is considered to be one of the first great triumphs of scientific calculation. Both circumference formulas use the irrational number Pi, which is symbolized with the Greek letter, π. Pi is a mathematical constant and it is also the ratio of the circumference of a circle to the diameter. . If you measure the earth through the poles the circumference is a bit shorter - 24,859.82 miles (40,008 km . The method of measuring the Earth's circumference was carried out in Alexandria, Egypt for the first time in the 3rd century BC. Its diameter (the distance from one side to the other through Earth's center) is 7,926 miles (about 12,756 kilometers). According to the latest calculations, its equatorial and polar diameters differ by negligible 10 km or 6,2 miles. Eratosthenes used the angular difference in latitude of two points on the same meridian and the corresponding linear distance between the points to determine the distance on the surface of the Earth per degree of latitude. Your goal is to measure the angle between this line and the meter stick. The formula for the circumference of the circle is 2 x r x pi. When it comes to measurements from pole-to-pole, or along the meridian line, the Earth has a circumference of 24.859.73 mi / 40.007.86 km. More precisely the circumference of the earth at the equator is 24,902 mi / 40,076 km. Since the sun "travels" once around the earth every 24 hours, . Using those measurements, the equatorial circumference of Earth is about 24,901 miles (40,075 km). Nature - Eratosthenes and the Circumference of the Earth. So, the circumference of this circle is the distance one would have to travel to go around the earth. Measured around the poles, the circumference is 40,007.863 km (24,859.734 mi). Draw an imaginary line between the top of the meter stick and the tip of its shadow. Did you know? As the Earth spins, centrifugal forces cause the planet to bulge slightly around the middle. Using data from the biblical books of Ezekiel and Revelation, we can easily arrive at a number between these two figures. As related accomplishments, he also demon-strated that Earth is essentially spherical and measured the tilt of its axis (23.5°). It happens because the Earth is . the formula for a circle is 2 pi r, right? 360/7 is close to 1/50th of a circle, so Eratosthenes concluded that the Earth's circumference was fifty times that distance. I originally wrote that this sounds like possibly a trick question to me. What is the circumference of the Earth? Earth, third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Modern science tells us that the circumference of the earth about the equator is 24,902.4 mi. Today we knows our planets circumferences is roughly 40,000 kilometers (24,850 miles). In the mid-20th century we began launching satellites into space that would help us determine the exact circumference of the Earth: 40,030 km. </p> <p>Eratosthenes was the head librarian in Alexandria, Egypt, the center of learning in the ancient world. If the information which Ptolemy used in his mapping procedure were gained from astronomical observations only, that is, from measured angles,18 his coordinates would have the same value on the "small" Earth (with the circumference of 180,000 stadia) as well as on the "big" Earth (with the circumference of 252,000 stadia). But how to come up from this fact for calculating the circumference of the Earth? Its average distance from the sun is about 93 million miles. Thereof, how the circumference of the Earth was first . x 50 = 25,000 mi. If we accept the account of Strabo that Eratosthenes measured the circumference of the earth as 252,000 stadia, the circumference would be 24,662 miles, and the polar diameter 7,850 miles-only 50 miles short of the true polar diameter. Asteroid 2022 EB5's discovery marks the fifth time an asteroid has been observed before hitting Earth's atmosphere. The radius of the Earth is r, and pi is approximately 3.1415. 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