heliocentric
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The sun-centered model of the solar system is called the heliocentric model. It was proposed by Nicolaus Copernicus in the 16th century and replaced the Earth-centered model (geocentric model) that was widely accepted at the time.
A sun-centered solar system is a system of planets centered around a certain type of star called a sun. It is often referred to as the Copernican model (since it was developed by Nicolaus Copernicus in 1543), or the Heliocentric model ('helio' means sun).
Heliocentrism, or heliocentricism, is the astronomical model in which the Earth and planets revolve around a stationary Sun at the center of the solar system. The word comes from the Greek (ἥλιος Helios "sun" and κέντρον kentron "center"). Historically, heliocentrism was opposed to geocentrism, which placed the Earth at the center. The notion that the Earth revolves around the Sun had been proposed as early as the 3rd century BC by Aristarchus of Samos, but had received no support from most other ancient astronomers.
Heliocentric model, proposed by Nicolaus Copernicus and improved on by Galileo Galilei
A geocentric model of the solar system. Which is incorrect.
The geocentric model places Earth at the center of the solar system, with planets and stars revolving around it. This model was widely accepted until the heliocentric model, which has the Sun at the center, was proposed by Copernicus in the 16th century.
Our star's name is Sol - that's why it's called the solar system.
Saturn
The Nebula Theory is also known as the Solar Nebula Theory. It is a widely accepted model for the formation of our solar system.