flat earth

  1. Cassi O

    Google Maps Measure Distance Using Great Circle

    Nearly everyone making videos showing something over the distant horizon, (including all those videos claiming the earth is flat), use a program like Google Maps to measure the distance. This under 3 min video demonstrates how Google Maps calculates the great circle distance on a globe, not a...
  2. Wiggles

    Refraction Variations Over Water to Bell Island

    For fun I'm doing a lot of long distance observations across the ocean. A flat earther made an excellent point on one of my videos: Source: https://www.youtube.com/watch?v=xtHPqxiscYw&lc=z222wpz4jsnagxygy04t1aokgvojlxjibrylwy0f5g35rk0h00410 (The image below is from #13 and #12 respectively)...
  3. Mick West

    Demonstrating the Curve of the Earth with observations of Beachy Head from Worthing

    Source: https://www.youtube.com/watch?v=9fJBrCs6VXM In this video a Flat Earther called "Dr. John" shares his observations of the coastline from the Southern English town of Worthing. He correctly identifies some landmarks along the way, but then it all goes wrong when he claims to be able to...
  4. Mick West

    Why Flat Earth Laser Tests are Misleading

    Source: https://www.youtube.com/watch?v=ookTfBP5sUU When you shine a laser beam across the surface of a lake, it is very prone to refraction, but often this is ignored, and the result is declared a victory. Laser tests are a very poor choice of a test of curvature, when much clearer (and...
  5. Rory

    Calculator for viewing angles

    Please find attached an excel spreadsheet containing a calculator which works out the viewing (elevation) angles for an observer of a given height on both a flat and sphere earth, from distances and elevations. This is what it looks like: For the flat earth, it's simple trig - tan(x)=(target...
  6. Rory

    How can we explain perspective calculations simply?

    Perspective is difficult, both to understand and to explain. This was recently brought home to me listening to flat earthers Nathan Oakley and Anthony Riley attempt to explain this photo of mountains in Washington and Oregon: All decent analyses show that it aligns perfectly well with a globe...
  7. Mendel

    Debunked: Air Map of the World 1945 is a flat Earth map

    https://planetruthblog.files.wordpress.com/2017/03/16298924_374575762915001_5952359865149692457_n.jpg https://aplanetruth.info/2017/06/28/1945-british-military-flat-earth-map/ 1945 British Military Flat Earth Map Uncategorized June 28, 2017 Comments: 11 Includes Flat Earth Air routes and...
  8. Mendel

    Homemade Gyrocompass finds North by Spin

    The gyrocompass was invented before WW1 and sees service on every submarine and big iron ship, where a magnetic compass would be unreliable or useless. An aquaintance of mine who attends naval school confirmed this for me. He also reported that a ship's gyrocompass takes several hours to start...
  9. brad fuller

    Does the inverse-square law apply to the flat-earth debunking tool chest?

    My google-fu has let me down on this one, so I'm asking the smarter crowd! I'm familiar with the inverse-square law as it applies to light fall of from a idealised spherical / point source, and I use this info (in practical terms) for flash photography, so I'm good on the basics. One obvious...
  10. Rory

    Earth curve calculator for obstructions

    I've been working on a calculator that outputs the predicted visible amount of a distant landmark when there's an obstruction above the horizon, such as a view over terrain with a ridge or intervening mountain. It seems to be working pretty well, and I'd say it's just about finished, but I have...
  11. Rory

    Explained: How Mount Rainier helps demonstrate the shape of the globe

    Here is a lovely shot of mountains in Oregon and Washington taken from the summit of South Sister in January 2007: Source: https://www.flickr.com/photos/rhane/372202821/in/photostream/ The summit of South Sister is recorded as being ~10,360 feet above sea level (plus or minus 3 feet...
  12. Rory

    Unidentified "space vehicle"

    Recent flat earth hero JTolan has uploaded a video of the moon shot using an 830nm infrared filter, and happened to catch what he says "appears to be a space vehicle in orbit": Source: https://www.youtube.com/watch?v=yCNlYerxPVA From 45 seconds he shows about 20 seconds of it moving across...
  13. Mick West

    What does the Flat Earth Look Like From Space, with Perspective?

    Flat earth folk seem to have no problem in visualizing the flat earth like this, as a disk, with the sun rotating around it. But if this is what it looks like from "space" then why can't you see the sun from Europe? Perspective? It might be interesting to ask a genuine flat earth believer...
  14. Neil Obstat

    Claim: zooming in on setting sun proves flat earth

    ...I don't know how these images work yet -- I'm still learning!... The first one (above) was not taken using a solar filter so the sun appears bigger than it really is, then the second one, taken later (supposedly) appears higher in the sky after zooming in with camera. Zooming in should...
  15. Mick West

    Earth's Radius Calculator (from the amount a distant object is obscured)

    By simply observing how much of an object is hidden by the ocean (or lake) horizon we can calculate the radius of the Earth. Take the three values (h = height of camera about the water, d = distance to object, x = amount of object hidden) and get the radius of the earth (r)...
  16. Whitebeard

    Quick and easy demonstration of the shape of the Earth

    Just stumbled on this vid showing away to prove the oblate spheroid nature of the Earth using hi-rez images from the Himawari 8 satalite.
  17. Rory

    Recreating the Bedford Level Experiment

    In another thread - as well as here - we've been talking again about recreating the Bedford Levels Experiment. A lot of new and useful information has come out: both about the previous experiments, and where they took place, as well as with regard to carrying out a definitive version. This is...
  18. danno

    Using a very long water level to measure Earth's curvature

    heres an idea: let's take 53 -100ft garden hoses and hook em together. find 2 miles of relatively flat ground(the flatter the easier) from a center post, run the garden hose 1 mile in 1 direction. drive another post. attach sections of clear tubing to both ends of the hose. fill the hose with...
  19. qed

    Third of millennials NOT convinced Earth is round

    FLAT EARTH SHOCK: Third of millennials NOT convinced Earth is round Despite overwhelming evidence that Earth is a spherical globe-shape, including both pictorial and video evidence, a third of young people believe that the Earth could be flat. A survey carried out by YouGov which polled 8,215...
  20. Mick West

    Debunking Guidelines for: "Convex Earth - The Documentary"

    No doubt this video will keep coming up. I've already had to delete two threads for not following the posting guidelines. The video appears like some kind of long-term hoax. It's designed to entertain rather than being a scientific examination. However some people will take it seriously, so...
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