Stellar Life Cycles
📋 What it is
Stars are born in gas clouds, shine by fusion, then die — small ones fade, huge ones explode.
🗣️ Coach says
Stars have lives. A collapsing gas cloud ignites into a star that shines by fusing hydrogen for millions to billions of years. Then mass decides the ending: small stars swell, shed layers and fade to white dwarfs; giant stars explode as supernovae, leaving neutron stars or black holes.
🧠 Memory hook
Gas cloud → star → death. Small = fade · huge = supernova.
😂 Giggle
What did Mars say to Saturn?
"Nice ring — is that a fashion statement or a physics equation?"
😲 Whoa!
The calcium in your bones and iron in your blood were forged inside stars — you’re made of recycled stardust.
✅ Quick check: What decides whether a star fades quietly or explodes?
Say your answer out loud first — then reveal.
Its mass — small stars become white dwarfs; very massive stars explode as supernovae.
Stellar fate is set by mass.
🪄 Trick question: Will the Sun explode as a supernova?
Careful — think it through, then reveal.
No — it’s too small; it will become a red giant, then a white dwarf.
Only very massive stars go supernova.
🧪 Try it! (2 minutes)
Sort three "stars" by size and predict each ending: quiet fade or supernova?