It was Copernicus.
Galileo
The planets in our solar system revolve around the sun
In the Geocentric Hypothesis (Earth-centered), retrograde motion can only be explained by describing the motion of planets as complex, curlicue paths. In the Heliocentric Hypothesis (Sun-centered), retrograde motion is described as changes in relative motion as the Earth overtakes a slower-moving planet in an outer orbit, or is overtaken by a faster-moving planet in an inner orbit. In the Heliocentric Hypothesis, all planets move in more-or-less circular orbits at more-or-less constant speeds, but planets closer to the Sun move faster. Thus, the Earth can overtake and pass each of the outer planets, making them appear to move "backward" (retrograde) for a time.
Kepler developed the Laws of Planetary motion, which include the orbits of planets being elliptical.
Heliocentric is the motion of earth around the sun. Geocentric is the motion of earth rotating about its axis.
It was Copernicus.
Galileo
in a heliocentric system earth and the other planets revolving planet's a geocentric system ,earth is at the center of the revolving planets
Geocentric motion of planet is that in which earth is at the centre of the universe and all other planets revolving around it.Heliocentric motion of planets is that in which sun is the of universe and other planets revolving around it.In planetary motion all the planets includes Earth revolving around the Sun in their fixed orbit.
Johannes Kepler developed the laws of planetary motion.However he was German not Austrian.
The planets in our solar system revolve around the sun
Johannes Kepler developed the laws of planetary motion.However he was German not Austrian.
A heliocentric model is a model of the planets' movements that places the Sun at the centre of the Solar System. Copernicus's model published in 1543 was the first heliocentric model. It resembled the Ptolemaic model in respect of the circles and epicycles that were used to explain the planets' movements. Kepler's model published in 1609 was also heliocentric, but it used planar elliptical orbits for the planets, which follow Kepler's 3 laws of planetary motion. It is now the accepted model.
In the Geocentric Hypothesis (Earth-centered), retrograde motion can only be explained by describing the motion of planets as complex, curlicue paths. In the Heliocentric Hypothesis (Sun-centered), retrograde motion is described as changes in relative motion as the Earth overtakes a slower-moving planet in an outer orbit, or is overtaken by a faster-moving planet in an inner orbit. In the Heliocentric Hypothesis, all planets move in more-or-less circular orbits at more-or-less constant speeds, but planets closer to the Sun move faster. Thus, the Earth can overtake and pass each of the outer planets, making them appear to move "backward" (retrograde) for a time.
Johannes Kepler was the scientist who included three laws of planetary motion as part of his heliocentric theory of the universe. These laws, known as Kepler's Laws of Planetary Motion, describe the orbits of planets around the Sun.
Kepler developed the Laws of Planetary motion, which include the orbits of planets being elliptical.
The heliocentric theoy was generally accepted after Newton linked up Kepler's three laws to the law of gravity and the laws of motion. Other strong evidence was the discovery that the Suns is far more massive than all the planets, and finally in the 19th century the discovery of stellar parallax, stars moving slightly as the Earth moves round its orbit.