## What important discovery did Charles Marie de la Condamine make while in the Amazon?

Charles Marie de La Condamine (28 January 1701 – 4 February 1774) was a French explorer, geographer, and mathematician. He spent ten years in territory which is now Ecuador, measuring the length of a degree of latitude at the equator and preparing the first map of the Amazon region based on astro-geodetic observations.

## What did Charles Marie de la Condamine discover?

Charles-Marie de La Condamine, (born January 28, 1701, Paris, France—died February 4, 1774, Paris), French naturalist, mathematician, and adventurer who accomplished the first scientific exploration of the Amazon River.

## Who were the members of the Geodesic Mission?

The equatorial mission was led by French astronomers Charles Marie de La Condamine, Pierre Bouguer, Louis Godin and Spanish geographers Jorge Juan and Antonio de Ulloa. They were accompanied by several assistants, including the naturalist Joseph de Jussieu and Louis’s cousin Jean Godin.

## What was the purpose of the Geodesic Mission?

The mission — the subject of Measure of the Earth — calculated the precise length of a degree of latitude at the equator, thereby helping to define Earth’s shape. Today, the geodesic mission’s fame has faded.

## What is the exact circumference of the earth?

roughly 40,000 kilometers

## What is the size of Earth?

6,371 km

## How was the Earth’s circumference calculated?

Eratosthenes then measured the angle of a shadow cast by a stick at noon on the summer solstice in Alexandria, and found it made an angle of about 7.2 degrees, or about 1/50 of a complete circle. Eratosthenes then used this to calculate the circumference of the Earth to be about 250,000 stadia.

## How many miles is it to the moon?

384,400 km

## Who first measured the distance to the sun?

astronomer Aristarchus

## What was Eratosthenes experiment?

Eratosthenes’ experiment (205 BC) gave the first estimation of the Earth’s radius simply by observing the shadow of a vertical stick at noon local solar time.

## Which of the following is 250000 stadia equal to?

Taking the Earth as spherical, the Earth’s circumference would be fifty times the distance between Alexandria and Syene, that is 250,000 stadia. Since 1 Egyptian stadium is equal to 157.5 metres, the result is 39,375 km, which is 1.6% less than the real number, 40,008 km.

## In what country did Eratosthenes live?

Libya

## What is the distance between Syene and Alexandria?

5000 stades

## What is Alexandria and syene?

1. That Alexandria and Syene lie on the same meridian. A meridian is an imaginary circle on the Earth’s surface which passes through both the north and south poles [17, p. 209 ]. The plane of any meridian bisects the Earth.

## When was the curvature of the earth discovered?

In the 3rd century BC, Hellenistic astronomy established the roughly spherical shape of the Earth as a physical fact and calculated the Earth’s circumference. This knowledge was gradually adopted throughout the Old World during Late Antiquity and the Middle Ages.

## What is the circumference of the earth according to Eratosthenes?

24,662 miles

## How many spheres were used by eudoxus?

27 spheres

## How does the sun cause shadows?

Outside, people make shadows when they block light from the sun. Your body blocks some of the sun’s light, causing a shadow to form in front of you. The shadow takes on the shape of your body. When the sun is in front of you, the shadow forms behind you.

## Is syene on the Tropic of Cancer?

Syene, near modern Aswân, Egypt, is close to the tropic of Cancer (23.5° N). At that line of latitude, at noon on the summer solstice (June 20 or 21), the Sun is directly overhead.

## How did Eratosthenes know what time it was?

Eratosthenes actually measured the length of the shadow of a tall building in Alexandria when the Sun reached its highest point in the sky on the Summer Solstice. This corresponds to noon in both Alexandria and Syene, where the Sun cast no shadow at the bottom of a deep well (hence the Sun was directly overhead).

## Is Aswan on the equator?

Aswan is located 4,554.51 mi (7,329.78 km) south of the North Pole. Aswan is 1,663.89 mi (2,677.78 km) north of the equator, so it is located in the northern hemisphere.

## Which among the Greek philosophers computed the earth’s circumference?

philosopher Aristotle

## Who is the father of geodesy?

Eratosthenes

## How is Aristotle related to Alexander the Great?

Aristotle was born in the city of Stagira in Northern Greece. Shortly after Plato died, Aristotle left Athens and, at the request of Philip II of Macedon, tutored Alexander the Great beginning in 343 BC. He established a library in the Lyceum which helped him to produce many of his hundreds of books on papyrus scrolls.

## What is Eratosthenes famous for?

Eratosthenes was a Greek mathematician who is famous for his work on prime numbers and for measuring the diameter of the earth.

## What was the greatest work of Eratosthenes Why?

Quick Guide – Eratosthenes’ Greatest Achievements In about 240 BC Eratosthenes calculated Earth’s size with good accuracy. Eratosthenes calculated the tilt of Earth’s axis relative to the plane of its equator with good accuracy. • He produced the first map of the world featuring meridian lines and parallel lines.

## Who discovered the radius of Earth?

## When did Eratosthenes discover the Earth was round?

June 19, 240 B.C.: The Earth Is Round, and It’s This Big. A modern illustration shows how Eratosthenes actually calculated the circumference of the Earth. Courtesy NOAA Ocean Service Education 240 B.C.: Greek astronomer, geographer, mathematician and librarian Eratosthenes calculates the Earth’s circumference.