Flat horizon
The horizon always appears perfectly flat 360 degrees around the observer, whether at 35 kilometers of altitude or at ground level. Provided that the images are not taken with a fish-eye lens, which distorts the shots, all photos and videos from amateur balloons, airplanes, and drones show a perfectly flat horizon.
The earth is flat!
The absence of evidence for earth's curvature
Although calculation applications, such as the one available on earthcurvature.com, are accessible, no field study is able to attest to the existence of the earth's curvature. The data used to estimate this supposed curvature, therefore, have no real and verifiable mathematical basis. On the contrary, there are many pieces of evidence that demonstrate the non-existence of this curvature, as evidenced by the examples below.
The earth is flat!
Laser Tests
Laser tests have been conducted at the Great Salt Lake in Utah, between shores 34 kilometers apart from each other and which, cartographically, are at the same height. According to official data, there should be a 90-meter difference in elevation due to the alleged earth's curvature between the two points. However, the laser remains perceptible at this distance. This argument alone invalidates the globe theory.
The earth is flat!
Maritime Lighthouses
The tallest lighthouses in the world peak at 90 meters high and are visible up to a distance of 65 km. According to official data, they should be 330 meters below the horizon at such a distance. Similarly, light buoys, less powerful and rising only a few meters, are visible up to 25 km. At this distance, they should be 50 meters below the earth's curve, based on official data.
The earth is flat!
The city of Chicago
The city of Chicago is visible from 94 kilometers away on the opposite shore of Lake Michigan. However, with the alleged earth's curvature, Chicago should be 700 meters below the horizon.
The earth is flat!
Lake Baikal
Lake Baikal, with its 636 kilometers in length, has a perfectly flat frozen surface. According to official indications regarding Earth's curvature, one should expect a difference in elevation of about 31 kilometers over this distance. Yet, this difference in elevation is absent. Moreover, tests conducted both at Lake Baikal and at the Salar de Atacama in Chile confirm this observation, revealing a flat surface in both cases.
The earth is flat!
Sea level
Water cannot bend and distribute uniformly over a spherical surface. By definition, sea level is always perfectly flat, and it is absolutely not compatible with the globe theory. "Level" means exactly what it expresses.
The earth is flat!
The theory of gravity
The theory of gravity contradicts the supposed centrifugal force of the earth. If it existed, it would have to be weaker at the equator, where the centrifugal force is stronger, than at the poles, where this force is absent. Moreover, it contradicts the laws of physics that a force, on a rotating sphere, is distributed evenly across its entire surface and exerts the same intensity at different points.
The earth is flat!
Cruising altitude
If the earth had curvature, a commercial airplane could not maintain a constant cruising altitude. In doing so, it would move away from the earth. To maintain its distance from the earth, a commercial airplane would have to constantly adjust its altitude downward. If an airplane flies from Paris to Lisbon, it will travel 1453 kilometers. However, over such a distance, it should cover a difference in elevation of 164 kilometers.
The earth is flat!
Gyroscopes
A gyroscope is a navigation tool that allows airplanes to maintain a constant orientation. However, in its most basic design, a gyroscope is designed to operate on a flat surface. With a declining horizon, a manual gyroscope would exhibit a continuous tilt on a spherical surface.
The earth is flat!
The changing size of the sun
If the sun were 150 million kilometers away, its size would remain constant throughout the day, everywhere in the world. At the scale of this distance, a simple change of position, like the alleged rotation of the earth, should not affect the perceived size of the celestial body. However, observations reveal that the apparent size of the sun does vary, especially in hot countries where the sun navigates directly overhead. In these countries, the sun is significantly smaller at dawn and dusk than at its zenith.
The earth is flat!
The proximity to the sun
If the sun were 150 million kilometers away, its rays would strike a specific point at a constant angle. However, it is observed that the rays illuminate the earth at different angles. This indicates that the sun is closer and smaller.
The earth is flat!
Temperature differences
If the sun were at unimaginable distances, we should not observe such large variations in temperature from one place to another. Yet, regions distant by just a few hundred kilometers can experience considerable temperature differences.
The earth is flat!
The constant altitude of the sun
The sun neither rises nor sets. It moves horizontally above the earth. What we interpret as rising or setting is actually due to perspective, much like a ceiling which, although at a constant height, appears lower to us when it is farther away.
The earth is flat!
Reflections on the sea
If the earth were truly spherical, the reflections of the sun and the moon on the sea surface could not extend to the visible horizon. The alleged curvature should, after only 3 kilometers, introduce a drop of 70 centimeters, making any reflection impossible, and this gradient would increase with each additional meter.
The earth is flat!
The circular movement of stars
For millennia, humanity has documented the same stars in the sky that move in a circular motion above us. However, official bodies state that the earth rotates on its own axis, moves forward, orbits around the sun, and the alleged solar system hurtles through a hypothetical universe at over 2.1 million km/h. These four simultaneous movements at staggering speeds are not compatible with the fact that we continually observe the same stars moving in a circular motion.
The earth is flat!
The invisible satellites
While our modern technologies allow us to zoom in on the moon with remarkable precision, curiously, no photographs of satellites taken from earth are available. Furthermore, no satellite image available to date offers a continuous view of the earth's rotation over an entire day. Moreover, despite the incessant circulation of thousands of airplanes in our sky, strangely, none of them appear on these supposed satellite images.
The earth is flat!
The truth about tides
Gravity, this concept well anchored in popular thought, seems inexplicably selective, choosing to act on certain bodies of water while neglecting others. In reality, the sun (carrying a positive charge) and the moon (carrying a negative charge) act like powerful electromagnets, generating a dynamic magnetic field in the water. This magnetic repulsion effect is the real cause of the tides, as demonstrated by small-scale experiments.
The earth is flat!
