Your SlideShare is downloading. ×
  • Like
Life Cycle of Stars
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×

Now you can save presentations on your phone or tablet

Available for both IPhone and Android

Text the download link to your phone

Standard text messaging rates apply

Life Cycle of Stars

  • 5,231 views
Published

 

Published in Technology , Business
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
No Downloads

Views

Total Views
5,231
On SlideShare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
255
Comments
0
Likes
2

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide
  • This is a Hubble Space Telescope image (right) of a vast nebula called NGC 604, which lies in the neighboring spiral galaxy M33, located 2.7 million light-years away in the constellation Triangulum.

Transcript

  • 1. 26.2 3/27/07 Star Stuff
  • 2. Forming a Star
    • Nebula
    cloud of dust and gas protostar (takes 10 million years) Contracts and rotates to form a ________
  • 3. A Star is Born!
    • A star when ______ starts
    fusion 10
    • Hydrogen atoms combine
    • to form Helium, other atoms
    • Takes ___ billion years
    • to form
  • 4. Adult Stars
    • Called “main sequence” stars
    • Longest period in life cycle
    • How long depends on star mass
  • 5. A Balancing Act
    • Two forces act on stars
      • Outward force from energy released by nuclear fusion
      • Inward force from gravity
  • 6. Old Age
    • Hydrogen fusion slows
    • Gravity contracts core
    • Core temperature rises
    • Helium fusion starts, releasing even more energy
  • 7. Small Stars
    • Mass of our sun
    • Fusion forms Helium, some Lithium, Carbon and Oxygen
    • Last up to ___ billion years
    10
  • 8. Small Star Old Age Red Giant
    • Core temperature rises with Helium fusion
    • Outer layers expand
    • Fusion in core produces heavier atoms – carbon & oxygen
    • Lasts ____ million years
    100
  • 9. Small Star Death
    • Hydrogen & Helium used up
    white dwarf planetary nebula
    • Outer layers expand to form a ________ _______
    • Star core cools and contracts to form a dim _____ _____
  • 10.  
  • 11. Large Stars
    • 6 x mass of our sun, or more
    • Fusion forms Helium, some Lithium, Carbon, Oxygen and Iron
    • Last up to ___ million years
    10
  • 12. Old Massive Star SUPERGIANT!
    • Can be 100 x larger than our sun
    • Hydrogen used up
    • Fusion in core produces heavier atoms
    • Finally, core made of Iron
  • 13. Dying Large Stars
    • Hydrogen gone - fusion stops
    • Core collapses, then rebounds with explosion
    • SUPERNOVA!
    • Lasts few seconds
  • 14. After Supernova…
    • If mass 3 or more times the sun, final stage is _______ ____
    neutron star pulsar dense
    • Protons and electrons collapse together to form ________
    neutrons
    • Very ______
    • Called ______ if rotating
  • 15. After Supernova 2…
    • For the most massive stars, final stage is _____ ____
    black hole gravity dense
    • Extreme ______
    • Very ______
    • No light escapes from it