It's not difficult to disprove a flat earth. One indisputable proof is the sundial. I can make a sundial here in the states for any country in the world and it works perfectly. The calculations for a sundial are based on spherical trigonometry and circular geometric shapes. It would not work (mathematically speaking) on a flat plane as that's a totally different shape.
That all sounds fine, but if you'd like to supply an argument or some proof that would be greatly appreciated. I especially appreciate it when people can actually present the proofs themselves rather than a copy/paste job, or a link. We made sundials in college, along with meridian plinths and just simple gnomons from large nails. I can run a light along a flat plane onto a sundial on a flat plane and get pretty much the same results I see on that sundial out in the back yard. I've also noticed that most of the proofs for a spherical earth can be used to prove a flat one as well. Erotosthenes is probably my favorite.
There is also a "doctrine" going around that says the earth is indeed round, but everything revolves around it. Again, Newtonian physics is at a severe disagreement with it and like my sundials, would not work. It wouldn't work within that framework.
Maybe that's why people are presenting different frameworks to get it to work.
Yet, due to the low relative velocity, Newtonian physics is good enough to calculate local space travel. The geosynchronous satellite is one proof.
Now if we could just get someone to show us any of these satellites. Supposedly there are over twenty thousand satellites floating around in space. The only one I've seen was skylab, and maybe a few others. I've never seen anything close to twenty thousand of them.
While such "universe revolvers" have "explanations" why the satellite is indeed stationary (!) instead of revolving at the rate the earth rotates, and have the same explanations for the Foucault pendulum, I find it interesting that the people who never even launched the rocket are going to tell scientists all about it, and indeed, I've have yet to see one mathematical calculation come from them.
I grew up about 15 miles from Vandenberg Air Force Base. Our next door neighbor worked on improving the accuracy of gps technology at area 51. He worked with a team that was able to get it down from 20 or 30' down to less than a few feet. He then got a job at as an engineer at Vandenberg. He worked there until he retired a few decades later. The guy was a genius. He could tell you the temperature of the sun in Fahrenheit, Celsius, and Kelvin without thinking about it. He looked kind of like the stereotypical nerd with pens and thingamabobs in his shirt pocket, but when he started talking it was like listening to a cross between Chuck Yeager and Albert Einstein. He drove an AMC Javelin. The car looked totally stock, but could blow the doors off any kid's hot rod in the neighborhood. I wouldn't be surprised it he was running rocket fuel to boost it.
I spent years watching rockets blow up. The first time I saw one that didn't explode I was dumbfounded. Running out to the front yard when we heard the windows shaking and the ground rumbling was always a treat, especially when they blew up shortly after leaving the launch pad. The fireworks display was always impressive. Sometime around the late 70's they got one to not only drop a few stages, but to fly downrange to the Kwajalein Atoll. One of the engineers, perhaps even our neighbor; was asked by a news reporter, what sort of potential enemy targets they could hit with any accuracy. His response: "The only thing we can hit with any degree of certainty is Los Angeles". VAFB is about a two and a half hour drive by car, and that is almost an exact quote. The comment was both hilarious, and a bit disturbing. Most people just shrugged it off after having a good belly laugh. It was also a good five years after the last moon landings. When all of those defense contractors moved into our sleepy little town the boost to the economy was not something anyone couldn't help noticing.
Years later VAFB got the okay to build a launch facility for the space shuttle. There were some complaints from Lompoc about the potential noise. The noise was already an issue with many of their other launches, but the space shuttle was going to be significantly louder, and people were not happy about it. So to appease the locals, the launch pad was built up against a mountain to muffle the noise. When the six billion dollar project was completed. Someone discovered that the pad was built too close to the mountain. This was a problem because they had to be able to dump a million and a half gallons of water onto the pad to prevent the pad from melting. There wasn't enough room for all of this water and exhaust to escape from this very nearby mountain. This was not some scribal or clerical error. This was not a miscalculation. This was just weird. I heard this from three people who worked at VAFB. One thought it was funny. One was completely disgusted and took an early retirement because of it, and the other thought it was disturbing that so many people could miss something like that.
Fortunately, the space shuttle blew up and this became the cover story for why they were no longer going to be doing launches from VAFB. So, what do you think really happened? a) the space shuttle blew up; B) they goofed on where to put their 6 billion dollar launch pad; or c) politics
I include politics because contracts can go from one contractor to another in a heartbeat. I'm inclined to go along with B) or c), but a) is a long shot. If it's c, then no problem. If it's b, then we got a serious problem because how is it that these guys can't seem to get a launch pad in the right location, but they can land a rocket capsule on the moon? How is it that they can't seem to hit anything farther away than LA five years after they've been to the moon so many times?
Building model rockets with solid rocket fuel engines was something we all did as kids, but one doesn't need to know much of anything about rocketry to know that something here just doesn't add up. When a whole town is busy cashing checks from the Federal government, there aren't going to be a whole lot of people asking any questions. Those who do are either laughed at, or quickly ignored, if they're even noticed in the first place.
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Here's a link to a clip of a guy who was watching a launch from Cape Canaveral skip to 1:25 to get the part where he talks about these brainiacs running for cover as the missile explodes a mere 1600' above their heads, and rains down literal fire from the sky onto not just the bunker they're sitting in, but onto the vehicles they drove to work that day.
https://www.youtube.com/watch?v=iJP5ncnLwgE[/quote]
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