A frame of reference consists of an abstract coordinate system and the set of physical reference points that uniquely fix the coordinate system and standardize measurements. Speed or velocity is relative to a frame of reference. It is possible that two speeds/velocities are measured relative to a different frame of reference and thus cannot be directly compared.
Flat-Earthers would often compare two different speed measurements like an airplane moving at 900 km/h (560 mph) and Earth’s surface near the equator at 1674 km/h (1040 mph). They would conclude the airplane should not be able to catch up with Earth’s surface and would not be able to land if the Earth is rotating. They are wrong. The speeds are measured relative to the different frame of reference, and therefore, cannot be compared directly.
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Generally, sunlit objects are far brighter than any stars. It is the reason stars are not visible in a lot of photographs showing sunlit objects unless the objects are overexposed and made much brighter than the correct exposure.
Flat-Earthers take the lack of stars in photographs as evidence of misconduct. They are wrong. If the primary object in the picture is sunlit, then in most cases, stars will not be visible.
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The first photo showing the entire Earth was taken in 1966 from the spacecraft Lunar Orbiter 1. Since then, there are too many photos showing the whole earth taken from various missions to space.
The advent of computers in the 80s introduced a new technique of generating such pictures. A satellite can be used to take many photos of the Earth from a low orbit, and computers can be used to assemble those pictures into a single photo of the Earth.
Flat-Earthers ‘discovered’ such technique, then they concluded that all pictures of the Earth taken from space are all composites, the results of manipulation or assembled by computers. They are wrong. Just because there were pictures created using such technique, it doesn’t mean there is no genuine picture showing the entire Earth, not composites, not stitched, and were taken from a single shot.
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The Apollo missions really happened and humans have actually visited the Moon. If someone fell victim to the flat-Earth conspiracy, then it would imply that they also fell victim to the Apollo moon landing conspiracy. But they are wrong.
Someone usually fell for the moon landing conspiracy theory because of emotional appeals and confirmation bias, but also because of their ignorance of the Apollo mission profile itself.
The following is a very brief description of the Apollo mission profile, numbered according to the numbers in the illustration.
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On December 3, 2014, NASA published a video describing the Orion EFT-1 mission, narrated by a NASA scientist, Kelly Smith. The mission was the first unmanned flight of the Orion spacecraft.
Some unscrupulous flat-Earthers decided to turn the video into ‘evidence’ that NASA never went to the moon. They cut down the video to the ‘important’ parts and added in prejudicial narration and subtitles. There are countless of such videos on YouTube, and at some point, it was nearly impossible to search for anything educational about the Van Allen radiation belts on YouTube.
They are wrong. There are, in fact, two Van Allen radiation belts. Apollo traversed the outer belt that has lower radiation level in a hurry, while Orion was deliberately sent into the far more dangerous inner belt. They are named ‘belts’ precisely because they are like the real belts. It is possible to bypass the most dangerous parts of the belt, just like Apollo did.
Orion EFT-1 is not ‘evidence’ that the Apollo mission didn’t happen.
Continue reading “Orion EFT-1, Apollo and the Van Allen Radiation Belts”
A widespread misunderstanding within the flat-Earth victims is related to velocity/speed. They seem to think velocity is absolute, while in reality it is measured from a specific frame of reference. Example:
“If the Earth is in motion around the Sun at 30 km/s, and Apollo traveled at only 11 km/s, then how could Apollo astronauts possibly make it back to the Earth?”
We used to measure velocity/speed relative to the surface of the Earth. But it is not always like that.
Continue reading “Velocity is Measured From Specific Frame of Reference”
The film ‘Dark Side of the Moon’ is a mockumentary. It is fictional but presented as if it is a real documentary. The film features guests like Donald Rumsfield, Henry Kissinger, Alexander Haig, Vernon Walters, Buzz Aldrin, and Stanley Kubrick’s wife. In the film, they all pretend that the Moon landings were faked, and created in a studio by Stanley Kubrick.
There are many doctored versions of the film circulated on the Internet. Usually, the ‘giveaways’ are cut to make the film more believable. Then, the film is presented as ‘evidence’ that the Moon landings did not happen. Unfortunately, many believe these edited versions of the film and don’t realize the events in the movie are entirely fictional.
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Van Allen Radiation Belt is a zone of radiation encircling the Earth. To flat-Earthers, Van Allen Radiation Belt is ‘evidence’ of the impossibility of space travel. To the rest of us, the Van Allen Radiation Belt is one of the challenges which is not impossible to overcome.
Continue reading “The Apollo Missions and Van Allen Radiation Belts”
Rockets follow a curved trajectory when going into space because their objective is not only to reach space, but also to enter Earth orbit. In Earth orbit, rockets have enough speed to counter Earth’s gravity and do not require a lot of energy to stay up there. To enter Earth orbit, a rocket needs to attain a high enough horizontal speed.
Flat-Earthers claim the curved trajectory of any rocket launch tells us no rocket has ever reached space. They are wrong. The curved trajectory is a way for rockets to enter Earth orbit.
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The thermosphere is a layer of the Earth’s atmosphere from about 95 km to 600 km. It is named ‘thermosphere’ because its temperature increases with altitude. The temperature in the thermosphere can reach 2500°C. However, air density in the thermosphere is very low to the point that heat conduction practically does not occur. Objects in the thermosphere will feel cold.
Flat-Earthers discovered that the temperature in the thermosphere could reach 2500°C. They are happy to ignore the other information which usually accompanies it: the air density up there is also far lower.
Continue reading “Space Flight and the Temperature in the Thermosphere”
“After Apollo, there was never another mission to the Moon. It means that the Apollo missions were faked, and we never actually went to the Moon.”
That’s how flat-earth believers think about Apollo missions, and missions to the Moon in general. Because they think there was never any missions to the Moon after Apollo, then they conclude that the Apollo mission was staged, and never happened.
Is that so? Apparently not. Although by the time this article was written, Apollo is still the only mission to the Moon that brought humans up there, doesn’t mean there are no missions to the Moon after that.
Continue reading “Missions to the Moon, Post-Apollo”