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The Life Cycle of Stars.

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Presentation on theme: "The Life Cycle of Stars."— Presentation transcript:

1 The Life Cycle of Stars

2 Do Now Compare Aldebaran with Sirius B. Which star is hotter? Which is brighter? How do you know?

3 Agenda Do Now Mrbrysonscience.wikispaces.com
Life Cycle of Stars Simulation Exit Ticket

4 Stellar Variables Heat Color Mass Life Cycle Size
Luminosity/Magnitude/Brightness

5 Marbles and Washer in Balloons
Place washer in blue balloon Place black marbles in white balloons Place white marbles in red and yellow balloons When you start to blow, blow your balloon down towards the floor You don’t want to swallow the marble!

6 Masses of your stars Red Star Yellow Star White Star Blue Star
Mass of Star .4 Solar Mass (2/5 the mass of our Sun) 1 Solar Mass (the mass of our Sun) 8 Solar Masses (8 times the mass of 16 Solar Masses (16 times the Sun):

7 Galaxy 222 The balloons represent stars
Every student has a star with a different mass How is mass different from size? Mass is the amount of matter in the object regardless of size. Ex. computer and box

8 When your star has finished its cycle, follow along with the rest of Galaxy 222 and fill in the boxes on your worksheet.

9 In our Stellar Nursery Red Star Yellow Star White Star Blue Star
Blow up Balloon to about 3” diameter What’s happening right now in the nursery?

10 10 Million Years Old Red Star Yellow Star White Star Blue Star Wait
Blow slightly more air into the balloon. This star is becoming a red giant.

11 11 Million Years Old Red Star Yellow Star White Star Blue Star Wait
Quickly blow up balloon until it is fully inflated. Pop balloon. Catch washer. This star exploded in a supernova and became a black hole.

12 50 Million Years Old Red Star Yellow Star White Star Blue Star Wait
Blow slightly more air into balloon. This star is becoming a red giant. Still a black hole.

13 55 Million Years Old Red Star Yellow Star White Star Blue Star Wait
Quickly blow up balloon until fully inflated. Pop balloon. Catch marble. This star exploded into a supernova and became a neutron star. Still a black hole.

14 10 Billion Years Old Red Star Yellow Star White Star Blue Star Wait
Blow up a little bit. This star is becoming a red giant. Still neutron star. Still a black hole.

15 12 Billion Years Old Red Star Yellow Star White Star Blue Star Wait
Blow up more. This star is a red giant. Still neutron star. Still a black hole.

16 12.5 Billion Years Old Red Star Yellow Star White Star Blue Star Wait
Blow up a little more. Then cut up balloon into small pieces. Catch marble. This star releases its outer layers as a planetary nebula and becomes a white dwarf. Still neutron star. Still a black hole.

17 100 Billion Years Old Red Star Yellow Star White Star Blue Star
Deflate Balloon This star becomes a white dwarf. Still white dwarf. Still neutron star. Still a black hole.

18 Discussion What was the effect of mass on life span?
Which stars deflated and which stars exploded? What does this tell you about our sun?

19

20 Exit Ticket Explain the effect of mass on a star’s life cycle?


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