How Much of the Earth Can You See at Once?

This course explores the concept of how much of the Earth can be seen at once. The learning outcomes include understanding the distance to the horizon, Earth's curvature, surface roughness, and texture. The course covers topics such as the Earth's surface features, state flatness, and the Roche limit. The teaching method includes interactive demonstrations, calculations using online tools, and references to research studies and articles. The intended audience for this course is individuals interested in geography, physics, astronomy, and earth sciences.