Eratosthenes was sure that the Earth was a sphere. He used the sun and geometry(几何学) to figure out the size of the Earth. He calculated that the circumference(圆周) of the Earth was 28, 600 miles(46, 000 kilometers).The true size of the Earth is 25, 000 miles (40, 000 kilo...
29.C,细节理解题,根据第二段"He calculated that the circumference(圆周) of the Earth was 28,600 miles(46,000 kilometers). "他计算出的地球的圆周周长是28600英里(46000公里),可知,他确信地球是圆的,故sphere是一个球体,故选C.30.B,词义猜测题,根据第二段大意可知,Eratosthenes 测算出地球的周长,可知...
What is Earth's volume, mass, density and surface area? The volume of Earth is 260 billion cubic miles (1.086 trillion cubic kilometers), while its mass is 6.6 x 1021 tons (6 x 1021 metric tons), according to NASA. With these values known, and Earth's oddball shape accounted for, ...
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"The Andes Mountains, 287 miles [462 kilometers] away, and although taller than the plane's altitude, lay below the sensible horizon, marked by the white horizontal line in the photograph," NASA officials wrote in adescription of the flight. "The Earth's curvature explains this phenomenon, ...
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How many kilometers is the asteroid belt from the sun? How long is the asteroid belt in miles? How many miles away is the asteroid belt from Earth? What is the distance between asteroids in the asteroid belt? What size do asteroids range between in the asteroid belt? How big are the ...
WithAustraliastretching over 7 million square kilometers (2,968,000 square miles), it should come as no surprise that it takes a long time to get around the country. Considering the distances, it’s no wonder few people end up traveling the whole country — there’s just too much ground...
But the most prominent gauge— and perhaps the most important, at least in terms of how many times you look at it while you're driving— is the speedometer. The job of the speedometer is to indicate the speed of your car in miles per hour, kilometers per hour or both. Analog ...
For reference, the circumference of Earth is 24,900 miles (40,000 kilometers). MARIA SHERMAN Maria Sherman is the music reporter at The Associated Press. She is based in New York City. twitter instagram mailto The Associated Press is an independent global news organization dedicated to ...