The heliocentric system, also known as the Copernican model, refers to the astronomical theory that places the sun at the center of the solar system, with the planets orbiting around it. Other synonyms for the heliocentric system include the Copernican system, sun-centered system, and geocentric alternative. This model replaced the previously accepted geocentric model, which placed the Earth at the center of the solar system. The heliocentric system has been widely accepted since its development in the 16th century by Nicolaus Copernicus, and has revolutionized our understanding of the universe. This theory has had a major impact on astronomy and space exploration, guiding our exploration of the solar system and beyond.