Students know the Sun is a typical star and is powered by nuclear reactions, primarily the fusion of hydrogen to form helium. Evolution of stars 2c. Students know the evidence indicating that all elements with an atomic number greater than that of lithium have been formed by nuclear fusion in stars. Students know accelerators boost subatomic particles to energy levels that simulate conditions in the stars and in the early history of the universe before stars formed. Galaxies and expanding Universe 1g.
Students know the evidence for the existence of planets orbiting other stars.
Students know the evidence indicating that the color, brightness, and evolution of a star are determined by a balance between gravitational collapse and nuclear fusion. D. Solar System 1. Students know the solar system is located in an outer edge of the disc-shaped Milky Way galaxy, which spans 100,000 light years. Inner Planets 4d. Outer Planets 1d.