The scientific observations about the size, shape, and circumference of the earth were made by Eratosthenes and Hipparchus at which of the following places?

Correct option is D

The scientific observations regarding the size, shape, and circumference of the Earth were made by Eratosthenes and Hipparchus in Alexandria, Egypt, during ancient times. Eratosthenes is famous for calculating the circumference of the Earth around 240 B.C., using the angle of the Sun's rays at two different locations (Alexandria and Syene). Hipparchus, another key figure in ancient geography and astronomy, also contributed to understanding the Earth's size and shape. Alexandria, being a major center of learning in the ancient world, played a crucial role in these scientific advancements.

Information Booster:

1. Eratosthenes made one of the first accurate calculations of the Earth's circumference by measuring the angle of the Sun’s rays at different locations.
2. Hipparchus was a Greek astronomer and geographer who contributed to the development of the geographical coordinate system and made advancements in astronomy.
3. Alexandria, in ancient Egypt, was a hub of learning and scholarship, home to the Great Library of Alexandria, where many scientific observations were made.
4. The measurements made by Eratosthenes were remarkably close to modern values, demonstrating the scientific rigor of ancient scholars.
5. Eratosthenes used the concept of latitude and longitude to make his observations, marking a significant step in the development of geographical science.