Eratosthenes' calculations did turn out to be quite accurate. Ezekiel's City: Calculating the Circumference of the Earth by Bob Pickle. Both of these values are very close to the accepted modern values for the Earth's circumference and radius, 40,070 km and 6378 km respectively, which have since been measured by orbiting spacecraft.

(40,076.5 km), and that the circumference about the poles is 24,860.2 mi. If it were possible to drive in a straight line at a constant speed of 65 mph around the planet Uranus, it would take 1,535 hours (that is just over 63 days). 6.179 069 900 7 AU "The astronomical unit (AU or au or a.u. The sun’s diameter is 1.4 million kilometers while its circumference is around 4.4 million kilometers. Let's assume it's equal to 14 cm. But since it is not perfectly round, this figure does not tell the whole story. This site is maintained by the Planetary Science Communications team at NASA’s Jet Propulsion Laboratory and Goddard Space Flight Center for NASA’s Science Mission Directorate. or sometimes ua) is a unit of length nearly equal to the semi-major axis of Earth's orbit around the Sun.

The circumference of the planet Uranus is 99,786 miles.

anyone smart bc i'v been wondering that for ever!! Making it simple, imagine that it is 333 000 times the mass of the earth. how big is the earth's circumference? In the 3rd century BCE, Eratosthenes calculated the circumference of the Earth to high precision. Determine the radius of a circle. On the day the Sun shone on the bottom of the wells in Syene, Eratosthenes measured the Sun's position in the sky over Alexandria. Answer Save.

6 Answers. Well, using pi it’s possible to work out the circumference of the Earth! On the summer solstice at local noon on the Tropic of Cancer, the Sun would appear at the zenith, directly overhead (sun elevation of 90°). The diameter of a circle is twice the radius, giving us a diameter for Earth … How to find the circumference of a circle.

Favorite Answer. You can also use it to find the area of a circle: A = π * R² = π * 14² = 615.752 cm². Planet Earth has a circumference of roughly 40,075 km, or 24,901 miles. Scientists have discovered that the diameter of the Earth is 12,742km.

Given this information, what is the circumference of the Earth? Have you ever wondered how big the earth is? The circumference of the earth at the equator is 24,901.55 miles (40,075.16 kilometers). Notes. This was mostly a matter of luck though. Modern science tells us that the circumference of the earth about the equator is 24,902.4 mi. The Earth Is Round, and It's This Big Courtesy NOAA Ocean Service Education __240 B.C. He in fact had two major errors, that just happened to cancel each other out.It is also a fact that nobody is sure how big his unit of distance was, and it is only now after the fact that we can take one of the possibilities and say he was only 2% off. Cosmos – Eratosthenes calculates Earth’s circumference. It is big enough to consume all the planets inside it. It even makes up 99% of the entire mass of the solar system. Substitute this value to the formula for circumference: C = 2 * π * R = 2 * π * 14 = 87.9646 cm. Finally, you can find the diameter - it is simply double the radius: D = 2 * R = 2 * 14 = 28 cm. : __Greek astronomer, geographer, mathematician and librarian Eratosthenes calculates the Earth's circumference.