Star Lifecycle

​Essential Question(s):

​

• How does our sun compare to other stars in the universe?

• How do stars change over time?

• How are stars classified on a Herztsprung-Russell Diagram?

Think about what is RED SHIFT?

​All stars begin in a cloud of gas

and dust called a

stellar nebula. ​

Gravity will cause the nebula to

contract.

The nebula will break into smaller

pieces. These pieces will

eventually form stars.

​

Life Cycle of a Star​

WHAT is the Life Cycle of our STAR?

Is an average sized star...

• Its born in a NEBULA

• It will stay in this main sequence phase for a long time.

• When it starts to die it grows into a RED GIANT

• Then it will go planetary nebula

• Then die as a white dwarf​

Our Sun

Luminosity

Brightness

In an HR Diagram brightness Increases from bottom to top

​

Temperature

In an HR Diagram​ temperature increases to the RIGHT