Explain phenomena caused by the regular and predictable motions of planets and moons in the Solar System. [lunar cycles, eclipses, equinoxes and solstices, zodiac constellations]
Describe how the Solar System formed.
Describe that the Solar System is part of the Milky Way Galaxy and how the Milky Way and other galaxies appear from Earth.
Describe the formation and life cycle of stars. [stellar evolution hypothesis]
Describe the properties of different stars (e.g., size, temperature, age, formation, energy production). [Hertzsprung Russell diagram and stellar evolution]
Describe how the Big Bang theory explains the observed properties of the universe (e.g., expansion, evolution, structures, element generation by fusion).