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BQ 3A News > Blog > Spain > When Columbus perplexed what was once miles and arrived in The us
Spain

When Columbus perplexed what was once miles and arrived in The us

October 8, 2025
When Columbus perplexed what was once miles and arrived in The us
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1999. yr, the spacecraft probe of the Local weather Orbiter of Mars in america. Columbus had extra success: 5 centuries sooner than he assigned the mistaken worth of Arabic mile and the error mentioned to come across a brand new continent.

Sailor in Salamanci

On the finish of 1486. ​​Christopher Columbus moved to Salamanca, figuring out that Catholic monarchs might be briefly dwelling on this town. At the moment, the Court docket didn’t have a set seat. I used to be hoping to persuade them to fortify their venture to reach in India after a right away course thru Atlantic, as a substitute for the Portuguese trail that corrected Africa. The similar proposal was once already offered by way of King Portugal Juan II, who refused, most probably urged Salamanca astronomer Diego Ortiz de Calzadilla (or Villegas).

In biography Existence and adventure of Christopher Columbus, Washington Irving stated, in Salamanca, “whether or not there might be so nonsense to imagine that there are antipodes with toes asp. 15th century He puzzled that the Earth was once round, however that they had explanation why to deter Columbus’s proposal.

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The land was once a sphere

From a minimum of 6th century AEC, Greek philosophers and astronomers like Pythagora, Plato and Aristotle declare that the rustic of spheres, each for philosophical causes (sphera was once thought to be an ideal geometric determine) and empirical proof.

Right through the moon eclipse, the shadow of the earth was once at all times distracted. As well as, the sailors spotted that new constellations at the horizon, which was once defined within the spherical land, seemed at the course from Southern Greece in Alexandria, which was once defined within the spherical land.

Eratostenes way. Francesco de Lorenzo / Spanish Geographic Societi (Bulletin 76), CC Problem Size Dimension

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Eratostenes from Cyrene (276-194 BC) went additional: the measure of the earth, when compared, in the summertime solstition, solar shadows at midday in Siena (present Aswan) and Alexandria. Within the Siena, the solar was once in value and didn’t design the shadow, whilst in Alexandria Gnomon – water marked within the solar within the solar – it designed, forming perspective fifty occasions not up to the circle.

To calculate the rim of the rustic, the gap between Sijena and Alexandria needed to multiply – which was once estimated at 5,000 stages, which gained a complete of 250,000 stages (devices of measure in earlier period). This worth is incessantly talked very on the subject of actual.

In spite of everything, his measure was once no longer the one who has change into in style. For hundreds of years, the dimensions of the rustic is accredited to explain Claudio Ptolemy (2nd century) in its geographer. He gave him a rod of 180,000 Egyptian stadiums (about 28 350 km, 30% not up to actual), in response to measures for posonium (c. 100 AEC).

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He spotted that the Canopus celebrity seemed on the horizon at Rhodes, whilst in Alexandria was once an identical to at least one/48 period of scale. Multiply 48 distance between each towns, which was once estimated at 3,750 stadiums, effects 180,000 stadiums.

file 20251004 56 m7hv3h.png?ixlib=rb 4.1

The arena to Ptolemia (Reconstruction Johannes de Armshein. Ulm.1482). Wikipedia, CC by way of Columbus mistakes

Within the 9th century, the Persian Astronometer Al-Pharghani, in his Memune, was once 56 miles and two-thirds of a mile (…). This calculation was once accredited and showed by way of 360 levels, this is, it’s 360 levels, or 360 levels. “.

Columbus thought to be that this knowledge was once related, as mentioned within the manuscript within the software of Mundi Imago Pedro d’Best friend (to be had within the Columbus library).

The issue seems when deciphering the worth of one mile. Al-Fargani used the Arab Solidarity of Al-Mammons, which we all know is an identical to at least one,973 meters (M). Subsequently, 20,400 miles 40 248 km, very on the subject of the true (about 40,000 km).

In medieval Europe, incessantly, that Mile misinterpreted as Romans (1,481 m), so the fringe could be an identical to those calculations at 30,215 KM.

Columbus, alternatively, used equivalence of about 1,250 m, very similar to that utilized in Portulunani or medieval navigation manuals, as Adan Szaszdi collects in his L. a. L. a. L. a. L. a. Milla de Colon (1958). It diminished the earthly scope at 25,500 km.

file 20251004 56 z5la7x.jpg?ixlib=rb 4.1

Reconstruction of the map of the German writer 1867. years. Wikipedia with Canary Islands in Japan

Even supposing not up to 30,000 KM, a extra accredited worth, which mentioned that Columbus’s proposal was once other that Asia has expanded to the east greater than then, after that, Cipango (Japan) was once CANCE (Japan). He concept that the navigation of the west might be reached for a number of thousand kilometers. This concept was once most probably taken from Tuscanelli.

Salamanca lecturers didn’t settle for this proposed heterodox; Because of this, they urged the travel. Alternatively, Dominican Frai Diego de Deza, Prince Prince Don Juan receives Prima, gave him his fortify. Whilst in Salamanca Columbus remained in Dominican monastoes San Esteban. Within the coming years, Deza affect was once an important to in the end succeed in the fortify of Isabel L. a. Catolica, which might open the brand new international.

Columbus considered the dimensions of a minor actual, however no longer precisely other from what was once taken over by way of his contemporaries. Its elementary error was once that Asia is attributed to a lot higher extension than he in large part diminished distance on a jerk. A number of papal foods in historical past had such transcendental penalties. We must look forward to the arena to Magallanes-Elcano to grasp the correct size of the rustic.

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