Another Argument Against Flat Earth

[Zetetica]

Watched some videos yesterday of rocket enthusiasts launching homemade rockets to altitudes of as high as 90,000 feet. The curvature was obvious in their on-board footage.

Did you look into what type of lens was on their camera?

 

[Zetetica]

Right. You've done a lot of investigation, have you? On YouTube and websites?

Online and offline.

 

[Zetetica]

Have you?

Some and I plan to do more once I move back to a place where I can visit the ocean.

 

[Yekcidmij]

Have you done any optics tests?

I have. I can use a sextant and a compass to obtain a bearing and co-altitude to a celestial object (though I don't need a sextant if that object is the sun - I can get the same info from a shadow). From the nautical table (or the air almanac if you prefer) I obtain the celestial's body's GHA and declination. From there it's just solving a spherical trig problem. I have two sides and an angle of a spherical triangle. From there I can get my lat/long.

But it only works for spherical trig, so therefore, the earth is spherical.

Nothing prevents one from doing Eratosthenes' experiment themselves and making their own "optical" observations. You don't need to live near an ocean.

 

[Zetetica]

I have. I can use a sextant and a compass to obtain a bearing and co-altitude to a celestial object (though I don't need a sextant if that object is the sun - I can get the same info from a shadow). From the nautical table (or the air almanac if you prefer) I obtain the celestial's body's GHA and declination. From there it's just solving a spherical trig problem. I have two sides and an angle of a spherical triangle. From there I can get my lat/long.

But it only works for spherical trig, so therefore, the earth is spherical.

Nothing prevents one from doing Eratosthenes' experiment themselves and making their own "optical" observations. You don't need to live near an ocean.

Eratosthenes's experiment should be done with three points, not two. Furthermore, his experiment is inconclusive if you factor in a local sun.

 

[Zetetica]

Thoughts?

Regarding, "it is Photoshopped but it has to be". Yes, that's authentic and NASA doesn't hide this fact, considering Rob works for them and is public about his graphics work.

 

[Yekcidmij]

Eratosthenes's experiment should be done with three points, not two.

You can do it with a shadow taking the ratio of an object's height to it's shadow. And I'm not sure what you mean by "three points." I can get two sides and an angle of a spherical triangle, if that's what you mean by "three points."

Furthermore, his experiment is inconclusive if you factor in a local sun.

Not sure what you mean by this.

 

[Zetetica]

Not sure what you mean by this.

A local sun, a sun which is thousands of miles away, rather than millions.

 

[Yekcidmij]

A local sun, a sun which is thousands of miles away, rather than millions.

A straight-line distance from the earth to the sun is irrelevant for this. I'm only using angles.

 

[SpiritualBeing]

A local sun, a sun which is thousands of miles away, rather than millions.

There is no sun that is thousands of miles away. Only one sun exists that is millions of miles from the Earth.

 

[Zetetica]

There is no sun that is thousands of miles away. Only one sun exists that is millions of miles from the Earth.

Seems there is a bit of debate about that.

 

[Strathos]

There is no sun that is thousands of miles away. Only one sun exists that is millions of miles from the Earth.

It wouldn't matter if it was, as the measurement only depends on the angle, which is the same either way. It's basic geometry, but I guess that's an evil conspiracy too.

 

[tas8831]

That's just ignorant.

If you say so.

 

[tas8831]

Did you look into what type of lens was on their camera?

Nope.

But please tell me it was a fish eye lens.

 

[tas8831]

Eratosthenes's experiment should be done with three points, not two. Furthermore, his experiment is inconclusive if you factor in a local sun.

Do you think the sun is within the atmosphere, like some crazy people do?

 

[tas8831]

Seems there is a bit of debate about that.

Not among non-Dunning-Kruger effect zombies.

 

[SpiritualBeing]

Seems there is a bit of debate about that.

Not sure what the debate could be. We just observed a probe travel millions of miles towards the sun and take a picture. Anything else is just an opinion.

 

[Zetetica]

Do you think the sun is within the atmosphere, like some crazy people do?

I don’t know where it is “up there”.

 

[Zetetica]

Not sure what the debate could be. We just observed a probe travel millions of miles towards the sun and take a picture. Anything else is just an opinion.

Did you? How did you?

 

[SpiritualBeing]

Did you? How did you?

We, meaning us humans and researchers that work at Johns Hopkins University's Applied Physics Lab in Maryland on the project. I personally obeserved the probe launch and take pictures of the sun through videos and images.