Which of the following is not a model of the solar system?
a. sun-centered
c. modern view
b. earth-centered
d. all of the above are solar system models

Correct answer choice:

B. Earth-centered

Explanation:

Heliocentric theory is the planetary model in which the Earth and planets rotate around the Sun at the focus of the Solar System. Historically, Heliocentric theory was objected to geocentric theory, which set the Earth at the core. This approach was explained in sections by several cosmologists over various times, particularly Aristarchus, Copernicus, Kepler, and Galileo.

The correct answer is option b, Earth centered

Explanation:

For the very first it was proposed by Copernicus that it is not the earth but sun which lies at the center of the system and rest all planets revolve around the sun. This sun centered model is known as heliocentric system and is also referred to as the modern view. This model was also helpful in solving two major queries instantly –  

a)Varying brightness of planets

b)Retrograde motion.

conservation of mass

mass before something happens = mass afterwards