flat earth

  1. Mick West

    Explained: Why a Spirit Level on a Plane Does Not Show Curvature "Corrections"

    Youtuber Darryle Marble, a believer in the "Flat Earth" theory, recently took a spirit level on a plane to attempt to demonstrate that the world was flat by showing the pilot never had to angle the plane down to compensate for the curve. Somehow the story went viral and the internet reacted as...
  2. Mick West

    Mistakes I made on my Joe Rogan Experience Flat Earth Episode

    During the course of my two hour talk with Joe Rogan on the Flat Earth theory, I made a few mistakes. Fact checkers have pointed out some of these to me, and I'll post corrections here to all the mistakes I'm aware of. I'd give timestamps to the video if that's also pointed out. Mistake #1 I...
  3. Henk001

    The Southern Cross, Celestial Poles, and The Shape of The Earth

    South of the equator when you are looking south at the southern night sky you always see the same point in the sky: the south celestial pole. Therefore the lines of sight must be parallel. Three examples Sydney, Australia (notice the Sydney Opera House on the left) Image Source...
  4. jeranism

    Explained: Observations of Canigou, Curvature of the Earth & Atmospheric Refraction

    Mick was just on Joe Rogan and spoke heavily on Flat Earth. One thing he said, was that many flat earth researchers incorrectly report observations of distant points. I agree, many people forget to include the observation height or the height of the observed landmark. However, there are some...
  5. Mick West

    Full-Disk HD Images of the Earth from Satellites

    There are several satellites that take photos of the full disk of the earth on a regular basis, but the most impressive are the three above. The first two (Himawari-8 and GOES-16) are geostationary satellites taking photos from 22,236 miles above the Earth's equator. The third, DSCOVR is located...
  6. Mick West

    Ground Truth: Verifying Stellarium's Model of The Solar System

    ground truth, n. 1. A fundamental truth. Also: the real or underlying facts; information that has been checked or facts that have been collected at source. 2. a. In remote sensing: information obtained by direct measurement at ground level, rather than by interpretation of remotely obtained data...
  7. Mick West

    Metabunk Flat Earth Route Simulator

    https://www.metabunk.org/flat/ I wrote a flat vs. globe route simulator over the weekend. It shows the shortest route between two points on a globe, a flat earth, and an standard map. The lengths of each route are calculated for the globe and the flat earth. (Note: does not work on mobile...
  8. Mick West

    How to Verify Your Latitude and Longitude to Show the Earth is A Globe

    Any position on the surface of the world can be represented by two numbers: latitude (the north or south angle from the equator) and longitude (the east or west angle from the Prime Meridian in England). These two numbers are generally referred to as coordinates. In the past you might have said...
  9. Mick West

    How to Verify that the Sun is a Distant Sphere, with Binoculars & Sunspots

    From past the orbit of Mars, the solar system looks a bit like the above. Earth is just a speck, not even visible here (at the end of the blue line). The sun is much larger than the earth, yet still seems small and far away. Its light shines equally in all directions. Can we actually verify...
  10. HoaxEye

    How to calculate the visible fraction of the Earth [e.g. 1972 Blue Marble, Apollo 17]

    This question originates from a YouTube video called "NASA Blue Marble 100% Debunked" by Flat Earth Asshole (pardon the language, but that is their channel name). In the video, they make a claim that NASA's Blue Marble photograph from 1972 is a fake because it is not a correct representation...
  11. Mick West

    A DIY Theodolite for Measuring the Dip of the Horizon

    A theodolite is a relatively simple instrument for measuring vertical and horizontal angles. It's commonly used for surveying, but you can also use one to get a rough estimate of the curvature of the Earth by measuring how far the horizon falls below eye level from different altitudes. Modern...
  12. Mick West

    Stand Up to Detect the Curve of the Earth

    A surprising fun science fact is that the curve of the earth is detectable simply by standing up. This works best with the surface of the ocean or a large lake, and it's something you can easily do at the beach. I recently gave it a go in a visit to Venice Beach near Los Angeles. With my Nikon...
  13. Mick West

    Views of Toronto from Hamilton and Fort Niagara Illustrate Earth's Curvature

    When people want to practically illustrate the curvature of the Earth, they often give the example of a boat disappearing over the horizon. While the boats example is perfectly valid, it's quite hard to observe and the effects of refraction make it confusing to interpret. It's also hard to...
  14. Mick West

    Calculating the height of something in a P900 photo when distance is known

    The following discussion has a error in that it was assumed the field of view was the same at long distances as it was at 8m. In fact the field of view narrows with longer focus. This alters the scale factor from 0.02 to 0.01737 for a P900 at full zoom and focussed on something over 100 meters...
  15. Provemewrong

    Explained: Why flying isn't impossible on a globe

    The earths curve is approximately 8 inches per mile squared. With planes flying at 500mph, the earth would curve beneath them around 31.5 miles every hour. In order for the plane to keep up with the curvature and not steadily head towards space, the plane would have to descend 2777 feet per...
  16. Mick West

    Review: Flat Earth - The History of an Infamous Idea - Christine Garwood

    The idea of a Flat Earth is firmly at the far end of the conspiracy spectrum. It's an extreme conspiracy theory because the belief requires that you accept that the entire space program is a fake, designed to cover up hundreds of years of an even deeper scientific conspiracy to hoodwink people...
  17. Mick West

    Where and How could the Wallace Experiment Easily Be Repeated?

    A classic demonstration of the curvature of the Earth was performed by Alfred Russel Wallace in 1870: http://blogs.scientificamerican.com/rosetta-stones/wallace-8217-s-woeful-wager-how-a-founder-of-modern-biology-got-suckered-by-flat-earthers/ The iron parapet of Welney bridge was thirteen feet...
  18. Rory

    Debunked: Eric Dubay "Flat Earth Proof" #13

    SPOILER ALERT: This post is very boring, and mostly pointless: not even flat earthers use this 'proof', and Dubay seems to have gone somewhat out of fashion, but I include it here because: a) I did the research already; b) others debunking his list on their blogs hadn't quite figured this one...
  19. Bass In Your Face

    Curvature Experiment showing relation between x-axis and z-axis

    Hey guys, I decided to whip up this experiment at my shop when somebody questioned a graphic of mine that I created to help demonstrate the horizon of a sphere the size of the earth, by zooming in it and showing the FOV. This was the graphic: (Yes I wrote in the wrong FOV for the last pic :/...
  20. Sandor Szekely

    Atmospheric sunlight refraction arguments on the Eratosthenes triangulation method

    DarkStar presented his measurement using the Eratosthenes triangulation method to prove the globe earth model curvature is right. http://flatearthinsanity.blogspot.com/2016/07/simple-proof-for-convexity-of-earth.html Here is the heart of the proof. Simply pick a line of longitude (along which...
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