Hardy-Weinberg PrincipleThe Hardy-Weinberg principle is a mathematical model used to describe the equilibrium of two alleles in a population in the absence of evolutionary forces. This model was derived independently by G.H. Hardy and Wilhelm Weinberg. It states that the allele and genotype frequencies across a population will remain constant across generations in the absence of evolutionary forces.
Introduction to the Sun The sun is one of about 200 billion stars in the Milky Way. As a central star, ie the center of a planetary system, the sun is orbited by eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Over 99% of the total mass of our solar system is attributable to the sun, which creates an enormous gravitational field that ultimately causes the planets to revolve around the sun, not the sun around the planets.