6.2.2 — Stars

Core

• 6.2.2.1 — State that galaxies contain many billions of stars
• 6.2.2.2 — Know that the Sun is a star in the Milky Way
• 6.2.2.3 — Know that other stars in the Milky Way are much further from Earth than the Sun is
• 6.2.2.4 — Know that astronomical distances may be measured in light-years

Supplement

• 6.2.2.5 — Know that one light-year = 9.5 × 10^15 m
• 6.2.2.6 — Describe the life cycle of a star: formation in gas/dust clouds, protostar collapse, stable star, hydrogen depletion, red giant/supergiant, supernova or planetary nebula, white dwarf, neutron star or black hole, and formation of new stars