But in the past, that wasn’t common knowledge, right? How did people in the past come to know that the Earth is round?
Today, I’ll explain three pieces of evidence that prove the Earth is round!
Most people know that the Earth is spherical by looking at images captured from satellites.
However, how did people come to know that the Earth is round during a time when many believed that the Earth was flat?
Today, let’s learn together with the guinea pigs about the three main pieces of evidence that prove the Earth is round!
Evidence ①: Shadow of the Earth Seen During a Lunar Eclipse
Indeed, the shadow of the Earth seen during a lunar eclipse is round!
The fact that the Earth’s shadow seen during a lunar eclipse is round can be taken as evidence that the Earth is round.
Evidence ②: The Apparent Position of the North Star Based on Latitude
It’s easier to understand when you compare how it would appear if the Earth was round versus if it were flat.
For instance, in Tokyo, which is located at latitude 36°N, the North Star appears at an altitude of 36°.
If the Earth is flat, the altitude at which the North Star appears would remain the same, regardless of where you are.
So, the different angles at which the North Star appears is also evidence that the Earth is round!
Evidence ③: The View of a Ship Coming into Port
Let’s assume that Chi-ga kun comes to pick me up as I board a ship entering a harbor, and let’s think about how Chi-ga kun looks at this moment.
If the Earth is flat, my entire body would appear blurred at first, and then gradually come into focus!
The three we mentioned are just a few examples; there are many more pieces of evidence that the Earth is round. Pretend you’ve gone back to a time without satellites and try to find more evidence yourself!
I will try to find other evidence that the Earth is round. Thanks for today, Hakase!
Thank you for reading to the end!