flat earth

I found a strange thing in goverment document named "Sailing Directions (Planning Guide and Enroute)". It says that mountains were sighted up to 300 miles away. Assuming observer is at "Crow Nest" at 115 ft ( 35m),Refracted hidden will be 8.83 miles. The highest mountains on Antarctica are 2.9...

I found an interesting video which shows an RC boat with a flashlight moving away from the camera, eventually disappearing below the horizon. This "test" however was conducted at a relatively small pond, no more than 600 feet in diameter. This is simply too small to allow for any curvature...

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...

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)...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

...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...

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)...

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.

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...

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...