Star Stuff!

• We’ll see that universe began with mostly H, He

• Therefore all “heavy” elements were made in stars prior to (lighter than iron) and during (heavier than iron) explosions

• These were sent out to enrich the ISM by ejection of outer layers (planetary nebulae formation) or supernovae (exploding stars)

• New stars formed from these new IS clouds!

• We are made of dead stars!

Notes: