Question

WHY THE EARTH IS ROUND BUT NOT FLAT

Answer 1

However, since 1968, we’ve used our spacecraft and satellites to take literally thousands of photos of Earth, and from every angle. Each shot shows Earth like Earth rise did. That’s only possible if Earth is a disk in three dimensions — a sphere. Today, astronauts like Scott Kelly even show us the curve of the Earth in real-time. He sees a sunrise every 90 minutes, a phenomenon impossible with a disk.