how do we know that the Earth is round
Answers
Since this is currently a popular topic, let’s take a moment to really break the science down (just bookmark this in the event that you encounter a “Flat Earther” during your online wanderings…).
Since this is currently a popular topic, let’s take a moment to really break the science down (just bookmark this in the event that you encounter a “Flat Earther” during your online wanderings…).There are several things that people often bring up when discussing obvious facts, such as the sum of two and two equaling four, the Earth traversing around the Sun once a year (not everyone understands this, actually), or perhaps the shape of the Earth. However, commonly held scientific facts are not always as self evident as they appear to be.
Answer:
Without being in the sky, it is impossible to see the curvature of the Earth. However, you can always see a demonstration of this if you visit a harbor or any place with a wide-open view of the water.
If you are able to watch a ship sail off to sea, watch its mast and flag as it fades off into the distance. You will notice that, in fact, it does not "fade off into the distance" at all; instead, you will see its mast and flag appear to slowly sink. The ship sailed beyond the point at which you would see it. Just to be sure, bring a pair of binoculars with you so that you can see even farther off into the distance.
It's as if you're watching it go over to the other side of a hill. This phenomenon can only be explained by a sphere-shaped planet.