Let's see what can be done with one observation.

Where was the sun on Dec 26? 5 days after the solstice, so somewhere near the southern tropic, 23.4 S.

The sun is always at 90 degrees elevation from some point on earth, and this point moves between the tropics, 46.8 degrees over half of a 365.25 day year. As a first approximation, the point of 90 degree elevation moved 1.3 degrees in 5 days. That puts it over 22.1 S latitude.

If the earth were flat, the sun, the point at 22 S latitude, and the point at 42 N latitude would form a right triangle.

What would be the distance from 42 N to 22 S latitudes, or 64 degrees? One degree of latitude is 69 miles, so that's approximately 4420 miles.

On a flat earth, a 26 degree elevation angle would put the distance from the earth surface to the sun at 4420 * tan (26) = 2160 miles.

Seriously?  This statement is preposterous.

Reality:

There is no effect that would make objects, or light/light rays/photons, obstruct your view if it was on a flat surface. Only a curved surface explains this observations.

Reality:
1.All pictures of the earth from space are admitted by NASA to be fake.
2. We're able to see objects such as land, buildings, boats that are supposed to be behind the "curve".
3. NASA and Obama say we can't leave low earth orbit.
4. The North Star never moves and the constellations have never changed ever.
5. Weather balloon footage and footage from airplanes show the horizon to be flat and always at eye level.
6. All of the astroNOTS that supposedly landed on the moon would not swear on the Bible.
7. Water is always level on the surface yet it makes up 70% of our earth.
8. NASA takes $50,000,000 a day.
9. Operation Paperclip.
10. The heliocentric model was created by freemasonic devil worshippers.
11. Air bubbles viewed in "space".
12. AstroNOT almost drowning in "space".
13. Scuba tank viewed in "space".
14. Density and buoyancy without magic gravity.
15. Gravity strong enough to hold the oceans to the earth yet birds and planes fly with ease.
16. GoPro lenses used to fake the "curve" of earth.
17. No observable proof of evolution.
18. Sun rays come down in angles and not parallel.
19. Moon light is always colder then moon shade and completely different than sunlight.
20. Super zoom cameras show that boats do not go over any curve.
21. Neil Degrasse Tyson says the earth is pear shaped as well as an oblate spheroid.
22. NASA caught faking a photo of the earth on the way too the moon.
23. More than one light source during the moon landings.
24. The UN flag is a flat earth map.
25. It took Captain Cook 3 years and 60,000 miles to circuмnavigate Antarctica.
26. Underground cables and ground based towers used for our communication.
27. Flight paths only make sense on a flat earth.
28. All but one challenger passengers are still alive today.
29. NASA caught using green screens.
30. No 24 hour live feed of the earth from space.
31. No actual photos of satellites in space.
32. Lighthouses
33. Sun dogs impossible on a globe
34. Antarctica treaty
35. Admiral Byrd said that there is more land.
36. The Michelson–Morley experiment proved the earth is stationary.
37. Auguste Piccard the first man to reach the stratosphere observed the earth is a flat disk upturned at the edges.
38. The sun and the moon in the sky at the same time.
39. Rockets never go straight up.
40. Bedford level experiment.
41. Tesla's real scientific findings.
42. Our own senses tell us that the earth is flat and stationary.
43. The sun and moon appear to be the same size.
44. The globe model was created 500 years before NASA.
45. No one has ever circuмnavigated the earth from north to south only east and west.
46. Sun dials.
47. All the "space" agencies across the land share the same vector logo.
48. Gyroscopes.
49. Astrolabes.
50. No parallax with the stars.
51. Time lapse shows the stars makings perfect circuits around the North Star.
52. Bolivian salt flats.
53. Sun appears smaller near the horizon.
54. We only see one side of the moon.
55. Railroads.
56. Air planes fly level and don't account for the curve.
57. We've only been able to dig 8 miles into the earth yet they say we have a molten core.
58. The top of the moon being illuminated during a eclipse.
59. Stars visible thru the moon.
60. Submarine periscopes
61. The firmament
62. Scripture
63. Saints
64. The Galileo Affair
65. Popes condemned the Pythagorean Doctrine

Unproven Pseudoscience Myths

1. Dark Matter
2. Dark Energy
3. Black Holes
4. Singularities
5. Event Horizons
6. Wimps  (weakly interacting massive particles)
7. Macho (massive compact halo object)
8. Mond (massive Newtonian dynamics)
9. Neutron Stars
10. Gravitational collapse
11. Gravitrons
12. Gravity waves
13. Inward pulling Gravity
14. Gravitational lensing
15. Gravitational constant
16. Schwarzchild radius
17. Gravitational radiation
18. Frame dragging
19. Anti-Gravity
20. Virtual Gravity
21. Quantum Field Theory
22. General Relativity
23. Gravity

24. Pretty much anything NASA says about space

What is preposterous about it?

Can you explain partial obstruction of distant objects on a flat surface?

If yes, I'd like to hear it, if no, welcome to globe Earth.