Earth curvature calculator

This app calculates how much of a distant object is obscured by the curvature of the earth. The following assumptions are made:

The earth is a convex sphere with a radius of 6371 kilometers.
Light propagates in straight lines.

The calculations are based on mathematical principles such as the Pythagorean theorem.

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"The hard part was creating a flat map of the Earth’s surface with four months’ of satellite data. Reto Stockli, now at the Swiss Federal Office of Meteorology and Climatology, did much of this work. Then we wrapped the flat map around a ball. My part was integrating the surface, clouds, and oceans to match people’s expectations of how Earth looks from space. That ball became the famous Blue Marble." Robert Simmon
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"A public that can no longer distinguish between truth and fiction is left to interpret reality through illusion. Random facts or obscure bits of data and trivia are used either to bolster illusion and give it credibility, or discarded if they interfere with the message. The worse reality becomes—for example, as foreclosures and unemployment skyrocket—the more people seek refuge and comfort in illusions. When opinions cannot be distinguished from facts, when there is no universal standard to determine truth in law, in science, in scholarship, or in reporting the events of the day, when the most valued skill is the ability to entertain, the world becomes a place where lies become true, where people can believe what they want to believe. This is the real danger of pseudo-events and why pseudo-events are far more pernicious than stereotypes. They do not explain reality, as stereotypes attempt to, but replace reality. Pseudo-events redefine reality by the parameters set by their creators. These creators, who make massive profits selling illusions, have a vested interest in maintaining the power structures they control." Chris Hedges
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"Now, eighteen months after the first light, three months after the true day, but a very few days after the pure Sun of that most wonderful study began to shine, nothing restrains me; it is my pleasure to yield to the inspired frenzy, it is my pleasure to taunt mortal men with the candid acknowledgement that I am stealing the golden vessels of the Egyptians to build a tabernacle to my God from them, far, far away from the boundaries of Egypt. If you forgive me, I shall rejoice; if you are enraged with me, I shall bear it. See, I cast the die, and I write the book. Whether it is to be read by the people of the present or of the future makes no difference: let it await its reader for a hundred years, if God Himself has stood ready for six thousand years for one to study Him." Johannes Kepler
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"Mathematics is the perfect way to fool yourself" Albert Einstein
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"The evidence provided by Galileo to support the heliocentric system do not even pass simple scrutiny, while modern physics has ruled for a long time now against both heliocentric and geocentric models as depictions of the “truth”. As Einstein eloquently said, the debate about which system is chosen is void of any meaning from a physics’ point of view. At the end, the selection of the center is more a matter of choice rather than a matter of ‘truth’ of any kind. And this choice is driven by specific philosophical axioms penetrating astronomy for hundreds of years now. From Galileo to Hubble, the Copernican principle has been slowly transformed to a dogma followed by all mainstream astronomers. It is time to challenge our dogmatic adherence to the anti-humanism idea that we are insignificant in the cosmos and start making true honest science again, as Copernicus once postulated." Spyridon Kakos
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"People give ear to an upstart astrologer [Copernicus] who strove to show that the earth revolves, not the heavens or the firma-ment, the sun and the moon. Whoever wishes to appear clever must devise some new system, which of all systems is of course the very best. This fool wishes to reverse the entire science of astronomy; but the sacred scripture tells us that Joshua commanded the sun to stand still, not the earth." Martin Luther
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"Modern Astrophysics, Quantum Physics, and Astronomy are, in fact, simply repackaged occultism, and they have been passed off as modern science for many decades. This is known as Scientism. The entire Big Bang Myth is simply a Satanic lie which was necessaty in order to transmit other occult lies, such as The Myth of Gravity, Evolution, Heliocentrism, and eventually, give credence and traction to the idea of alien life. The primary occult ideology at the basis of all this is the idea of Cosmic Pantheism. The Big Bang Myth reinforces the idea that The Cosmos evolved from a pin prick of substance, and expanded out for billions of years, which is identical to the Kabbalistic occult teachings at the core of Pantheism." Gregory Lessing Garrett
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"Scientism is where people turn science into a kind of religion. It becomes a kind of dogmatic belief system. The irony is that a lot of people think that religion is dogmatic and science is free-thinking, but actually, in my experience, some of the most dogmatic people I know are people who've made science into a kind of religion. We still have flat earthers, we have people that don't believe in vaccinations, and what do we do about it?" Rupert Sheldrake
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"It may be boldly asked where can the man be found, possessing the extraordinary gifts of Newton, who could suffer himself to be deluded by such a hocus-pocus, if he had not in the first instance willfully deceived himself? Only those who know the strength of self-deception, and the extent to which it sometimes trenches on dishonesty, are in a condition to explain the conduct of Newton and of Newton’s school. To support his unnatural theory Newton heaps fiction upon fiction, seeking to dazzle where he cannot convince. In whatever way or manner may have occurred this business, I must still say that I curse this modern theory of Cosmogony, and hope that perchance there may appear, in due time, some young scientist of genius, who will pick up courage enough to upset this universally disseminated delirium of lunatics." Johann Wolfgang von Goethe
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"Science today is locked into paradigms. Every avenue is blocked by beliefs that are wrong, and if you try to get anything published by a journal today, you will run against a paradigm and the editors will turn it down." Fred Hoyle
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"Today we cannot say that the Copernican theory is ‘right’ and the Ptolemaic theory ‘wrong’ in any meaningful physical sense." Fred Hoyle
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"we can take either the Earth or the Sun, or any other point for that matter, as the center of the solar system." Fred Hoyle
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"The struggle, so violent in the early days of science, between the views of Ptolemy and Copernicus would then be quite meaningless. Either CS [coordinate system] could be used with equal justification. The two sentences, “the Sun is at rest and the Earth moves,” or “the Sun moves and the Earth is at rest,” would simply mean two different conventions concerning two different CS." Albert Einstein
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"You imagine that I look back on my life’s work with calm satisfaction. But from nearby it looks quite different. There is not a single concept of which I am convinced that it will stand firm, and I feel uncertain whether I am in general on the right track." Albert Einstein
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"No physical experiment ever proved that the earth actually is in motion." Lincoln Barnett
Earth Curvature Calculator