An in depth look at ptolemys creation of the first geocentric model of the solar system

Young Earth creationists such as Ken Ham and Doug Phillips believe that God created the Earth within the last ten thousand years, literally as described in the Genesis creation narrative, within the approximate time-frame of biblical genealogies detailed for example in the Ussher chronology.

An in depth look at ptolemys creation of the first geocentric model of the solar system

Imagine what a young child, naive to astronomy, sees at dawn: The sun appears on one horizon, climbs to a peak as it crosses the sky, and departs as it meets the other horizon.

In the night sky, the moon and stars do the same essential thing. By all appearances, the world around us sits still, and everything in the sky revolves around it.

This, in fact, is what most of the serious thinkers of bygone millennia believed. The consensus was that a possibly flat Earth was at the center of the entire universe, and that everything else in the sky, from the sun and moon to the stars and planets, revolved around the Earth.

What seems like a quaint and laughable notion today was not only popular in ancient times, but defensible. In exploring the heliocentric model of the solar system, an overview of the solar system's basic contents is a good starting point.

The word "solar" means "pertaining to the sun" the Latin word for which is "sol"and the sun, which is merely a star that happens to be comparatively close to Earth, is far and away the most massive object in the system as well as the only body of its type.

Because of the gravitational force exerted by the sun's enormous mass, everything else in the solar system revolves around it, directly or as part of another system. Sciencing Video Vault The planet is the second type of solar-system body.

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There are eight of these, ranging in size from Mercury, the smallest, to Jupiter, the largest. Pluto was formerly considered a planet and was the most distant planet from the sun, but was "demoted" early in the 21st century to a dwarf planet, and as such it is now a small solar-system object more on this soon.

Moons, or natural satellites, are the third type of body in the solar system. These bodies orbit planets, but because planets orbit the sun, the sun remains at the true center of the path of every moon.

Earth has one such natural satellite, which is about one-fourth the diameter of Earth; most of the larger, "gaseous" planets have dozens of moons.

The fourth kind of solar-system body are small objects or small bodies. These include comets, asteroids, icy regions called the Oort Cloud and the Kuiper Belt, and the mini-system of Pluto and its two satellites or moons, if you prefer, although this one is tricky since Pluto is no longer considered a planet; its status remains controversial with some organizations calling for its reinstatement as a full planet.

What Is Geocentrism and Heliocentrism? Purely speaking, geocentrism is the idea that the Earth is the center of some reference system usually "everything"whereas heliocentrism is the belief the sun is the center of some reference system in modern usage, the solar system.

As suggested previously, geocentrism is the outdated and clearly disproven idea that the Earth lies at the very center of creation itself, with the other observed objects in the sky orbiting the Earth at various distances.

This notion originated with the Greek scientists Aristotle and Ptolemy well over 2, years ago, was embraced by early Christians and the Catholic Church, and only began to be called into serious question in the 16th century, starting with the work of the Polish astronomer Nicolaus Copernicus Copernicus was not the first to notice that the planets visible to the naked eye — Mercury, Venus, Mars, Jupiter and Saturn — varied in brightness over the years.

He was also not the first to observe that they exhibited retrograde motion, in relation to the background stars. This terms describes the way the planets sometimes briefly reverse the direction of their slow trek against the background stars before resuming motion in the usual direction.The geocentric model, in which planet Earth is the center of the Universe and is circled by the Sun and all the planets, had been the accepted cosmological model since ancient times.

For centuries, the scientific consensus, fueled by religious dogma, was that the Earth was at the center of the universe (geocentric model). In about the s, evidence mounted that the sun, rather than the Earth, is at the center of the solar system, but not the universe (heliocentric model).

Copernican System The first speculations about the possibility of the Sun being the center of the cosmos and the Earth being one of the planets going around it go back to the third century BCE.

the geocentric model: a round Earth at the centre of a celestial sphere Used model to determine layout of solar system, with planetary distances in astronomical units (AU) - 2.

Science progresses through the creation and testing of models of nature that explain the observations as simply as possible - 3.

A scientific model must make. In astronomy, the geocentric model (also known as geocentrism, or the Ptolemaic system), is a description of the Cosmos where Earth is at the orbital center of all celestial bodies. This model served as the predominant cosmological system in many ancient civilizations such as ancient Greece.

Geocentrism and Creation Geocentrism and Creation. by Dr. Danny R.

An in depth look at ptolemys creation of the first geocentric model of the solar system

Faulkner on August 1, Share: , so his favoured geocentric model, the Tychonian system, should prevail. This is preposterous. A look at geocentrism, Creation 10(3):8–13,

Ptolemaic system | astronomy |