Your SlideShare is downloading. ×
Life cycle of a star
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×

Introducing the official SlideShare app

Stunning, full-screen experience for iPhone and Android

Text the download link to your phone

Standard text messaging rates apply

Life cycle of a star

4,175
views

Published on

Published in: Education

1 Comment
2 Likes
Statistics
Notes
No Downloads
Views
Total Views
4,175
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
65
Comments
1
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

Transcript

  • 1. Life Cycle of a Star
  • 2. Birth • Stars are born in the nebula, which are huge clouds of gas and dust. The nebula begins to contract under the pull of its own gravity. This forms a protostar.
  • 3. Protostar The star begins to take shape. The temperature continues to rise and nuclear fusion begins to take place. The pressure from inside the star finally equalizes the gravity pushing in, and the star stops contracting.
  • 4. Nebula Sun size stars Huge Stars Giant Stars
  • 5. Main Sequence Star • Stars live out the majority of their lives in a phase termed as the Main Sequence. This is the longest, most stable period of a star’s life. It converts hydrogen to helium in its core, generating heat and light.
  • 6. Red Giants and Supergiants • As the nuclear fuel becomes depleted the core contracts and our layers expand.
  • 7. Sun Size Star Sun  Red Giants  Planetary Nebula  White Dwarf  Black Dwarf 
  • 8. Planetary Nebula • Now the outer layers of the star start to drift off into space. The star loses most of its mass to the nebula.
  • 9. White Dwarf • The star cools and shrinks. No nuclear reactions take place and the faint star radiates it heat into space.
  • 10. Black Dwarf • The star will eventually lose all its heat and energy and become dark and cold.
  • 11. Huge Stars Huge Star  Red Supergiant  Supernova  Neutron star
  • 12. Supernova • The core collapses in an instant. Forces in the core overcome the gravitational forces, causing a massive, short-lived explosion.
  • 13. Neutron Star • It contracts into a small star that has extraordinarily strong magnetic field, and a rapid spin.
  • 14. Giant Stars Giant Star  Red Supergiant  Supernova  Black Hole
  • 15. Black Hole • It contracts and becomes a black hole. The gravitational field is so strong that even light cannot escape.
  • 16. H-R Diagram • The Hertzsprung-Russell Diagram is a graphical tool that astronomers use to classify stars according to their luminosity, spectral type, color, temperature and evolutionary stage.