Originally posted by jeantherapy
Originally posted by gravitor
So this will be My last reply on this thread.
Last reply? Fail.
Originally posted by gravitor
Originally posted by ThePeaceMaker
Aw can you not answer my confusing questions before you go ?
Captainpudding has declared Me mentally deficient, and some nice men have arrived with a jacket that fastens up at the back....so My fingers won't be able to reach the buttons, sorry.
They won't remove the jacket until I agree that the earth is a football.
Originally posted by kimish
Thanks for the read OP. I needed a laugh today.
Originally posted by CB328
The greeks figured out that the world was round because of the fact that we can only see something around 30 miles on the ocean before it moves out of view due to the curvature of the earth.
For an observer standing on the ground with h = 1.70 metres (5 ft 7 in) (average eye-level height), the horizon is at a distance of 4.7 kilometres (2.9 mi).
This is not necessarily the case. You can put a camera at ground level at water and even at distances of 6 miles and beyond there won't always be noticeable drop-off. There is probably a simple explanation for this but it can and does happen and there is plenty of video demonstration of this on YouTube. My question to anyone who believes the Earth is flat is, why was there an obvious curve when that Felix guy recently base-jumped from 28,000 feet? I asked this question to some guy a few months ago and his argument was that gravity bends the light from Earth and merely gives the illusion of a curve. By my understanding people who propose this theory argue that no actual photograph or video-recording of Earth from space has been taken and that the ones that exist are either composites or faked in real-time as the documentary 'A Funny Thing Happened on The Way to The Moon' argues. The footage from the base-jump would have to be faked too, but it looked real enough to me and I'm not sure how they would go about faking it.
originally posted by: downtown436
Ok, here is why I think the Earth is indeed a sphere.
I have been in a lake, that was dead calm, like glass, and looked across the water with my eye only an inch or two above the water at a sailboat across the lake. I could only see the sail, not the boat. Why???? Because you can actually see the curvature of the earth if you have a big enough body of water. Meaning that there was a hill of water between me and the boat.
What about amateur pictures from weather balloons where you can supposedly see the curvature of the planet?
Most of these endeavours use a fish-eye or other wide-angle lens. This provides a spectacular field of view, but also introduces barrel-distortion in the image.
Look at 1:33-1:36 in the video.
Look at 2:47-53 in the video
It's pretty clear that the horizon is flat when he opens the door to the capsule, and that it looks curved when seen from the wide angle view outside of the capsule. The horizon looks curved even at ground level from the outside cameras.
Some curvature should be evident from height above the portion of the earth lit by the sun. This is the boundary of the area illuminated, and not (necessarily) the bounds of the earth.
originally posted by: Another_Nut
a reply to: Nathan-D
fish eye lenses
The curvature of the Earth was visible on my Concorde flight, along with the darnkess of the sky. It wasn't black but very dark blue. I have not been able to see either features on a normal flight up to 40k
From a friend who was a military pilot, and from sources such as the many books I have read on the SR-71 and U-2 it can be said that this doesn't appear until you get up to 55K-60K feet.
Whilst traditional subsonic jetliners usually reach a cruising altitude of thirty to thirty-five thousand feet, Concorde nearly doubles that, cruising at an altitude between fifty-five and sixty thousand feet