Stars and Their Life Cycle

What’s inside

• What process provides the main source of energy for a stable main-sequence star like the Sun?
• Match each stellar object or stage with its correct description.
• Place these stages in the typical life cycle of a low- or intermediate-mass star.
• What happens when a Sun-like star leaves the main sequence?
• Match each stellar stage with the dominant nuclear process associated with it.
• Arrange these events in the formation of a star from a cold molecular cloud.
• Which factor is the strongest determinant of a star’s total main-sequence lifetime?
• Match each stellar remnant with the type of progenitor most directly associated with it.