There is a famous formula that Flat Earthers frequently use to calculate the curvature of the Globe Earth. This formula is an approximation. Here I derive the exact formulas and the approximation 8" per miles squared and compare the results in a Calcularor Form.

Here I present an interactive Flat Eart Model that can explain Sunrise, Sunset, Moonrise, Moonset, Sun's position on Equinox, Seasons, Solar and Lunar Eclipses, Star Trails, 24 houre Day/Night at the Northpole and Antarctica, Celestial Poles, why people south of the equator can see the same stars rotate clockwise around a singe celestial pole at the same time at different continents. But the Model still has some unsolvable flaws.

This page shows scenes computed with a Globe Model and a Flat-Earth Model of the Earth and compares them with corresponding Real Images of the same scene to see, which Model-Predictions match Reality.

For us living beings on the surface of the earth, the earth looks flat. For this reason the so-called Flat-Earther (FE) claim that the earth is a flat plane rather than a globe.

With the help of a simulation, I show, up to what altitudes the earth appears flat, although it actually has a spherical shape. Using some animations, you can learn how to recognize the curvature of the earth, or in what circumstances it appears flat. The simulation can also simulate refraction. I prove by means of photos, how the simulation depicts reality, by superimposing the simulation results onto photos.

Run Curvature App in a separate Window

Wie stark ist die Krümmung der Erde? (German Version)

Saturday, December 30, 2017 - 20:47 | Author: wabis | Topics: FlatEarth, Knowlegde, Animation, Interactive

To comprehend how curvature on a globe is expected to look like, we have to comprehend how perspective distortions look on a Globe. In this article you can play with an App showing a grid of a Globe Model to see how it is distorted by perspective especially when viewing from low altitudes.

Saturday, December 30, 2017 - 20:47 | Author: wabis | Topics: FlatEarth, Knowlegde, Geometry, Interactive

For the first time in 50 years, a technical trick is used to create true color images of the entire earth with the help of the new weather satellite Himawari 8 (Japan) and combine them into video sequences. The pictures and video sequences are freely available. Here, a sequence of original shots and a video in true colors can be viewed and I explain how the true color images are computed from the original data.

Echtfarb-Aufnahmen der Erde vom Satelliten Himawari der JMA

Thursday, December 07, 2017 - 00:25 | Author: wabis | Topics: Knowlegde, Space, Animation, Interactive

According to geodetic measurments the shape of the earth is not exactly a sphere, but slightly bulged at the equator - oblate spheroid. In this article I show, that this small deviation from a perfect sphere can be measured on high resolution satellite images.

Deutsch: Können wir die Abplattung der Erde in Satellitenbildern sehen?

This App lets you create a Flight Plan based on the Flat Earth Model.

**Note: This Flight Plans must not be used in real flights, because the plans produced by this App are not accurate, because the earth is not flat but a globe.**

On different images of the earth from space the continents appear in different sizes, as in the picture above North America from 2002 and 2012. This has to do with Perspective and the distance of the camera from the Earth. Here I show in an animation how this effect works.

Deutsche Version: Das Wahre Gesicht der Erde, Kameradistanz spielt eine Rolle

I derive the formulas to compute the distance between two points for both models. The computations can be carried out using a calculation form. An example is then used to decide which model corresponds to reality.

Tuesday, May 23, 2017 - 21:27 | Author: wabis | Topics: FlatEarth, Geometry, Mathematic, Interactive

In a fast-flying aircraft, a maximum centrifugal acceleration acts away from the earth so that a part of the earth's attraction force is canceled out and therefore one is slightly lighter in the aircraft than on the ground.

In this article, this effect can be calculated with a calculation form. The calculation is verified by means of a real flight. In addition, all the formulas used are listed and explained.

Deutsche Version: Zentrifugal- und Gravitationsbeschleunigung in einem Flugzeug

Wednesday, January 25, 2017 - 00:08 | Author: wabis | Topics: FlatEarth, Knowlegde, Aviatic, Mathematic