The Life of a Star http en wikipedia

The Life of a Star http: //en. wikipedia. org/wiki/File: The_life_of_Sun-like_stars. jpg Samantha Wingate

What is a Star? �A star is a huge sphere of very hot glowing gas. �When stars are grouped together we call them constellations. �The big dipper is constellation that we see often. http: //en. wikipedia. org/wiki/File: Big_dipper_from_the_kalalau_lookout _at_the_kokee_state_park_in_hawaii. jpg

The Sun �The Sun is the only star in our solar system All eight planets, comets, and an asteroid belt, revolve around the Sun. �The Sun is a yellow, medium sized star. http: //en. wikipedia. org/wiki/File: Yohkohimage. gif

Classifying Stars �Stars are classified according to their temperature and brightness. �Hot Stars are Blue or White �Cooler Stars are Red or Orange

Classifying Stars Cont… �A young star is called a dwarf star They can be colored red, yellow, or white. ▪ Our Sun is a yellow dwarf �Older Stars are called Supergiants They can be colored or blue.

The Timeline of a Star �Our Sun is an average star. The chart below shows the lifecycle of our sun over billions of years. http: //en. wikipedia. org/wiki/File: Solar_Life_Cycle. svg

How Stars Are Born �Star are formed from giant clouds of dust and gas. �Then, from gravity, the cloud collapses into a rotating gaseous ball. �Once the new star gets hot enough it will begin to create energy from a process called nuclear fission. �This created energy allows the star to glow for billions of years.

Where Stars are Born �The Eagle Nebula http: //en. wikipedia. org/wiki/File: Eagle_nebula_pillars. jpg

The Death of Stars �A Star dies when it runs out of gases to burn. �The Star will first expand into a red, super giant. http: //en. wikipedia. org/wiki/File: Betelgeuse_star_%28 Hubble%29. jpg

The Death of Stars Cont… �Then the Star will collapse and explode. This takes billions of years. �The size of the star determines how long it’s life is. The bigger the star the shorter the life.

After a Star Explodes… �The Crab Nebula http: //en. wikipedia. org/wiki/File: Crab_Nebula. jpg

References �Picture References http: //en. wikipedia. org/wiki/File: The_life_of_Sun-like_stars. jpg http: //en. wikipedia. org/wiki/File: Big_dipper_from_the_kalalau_looko ut_at_the_kokee_state_park_in_hawaii. jpg http: //en. wikipedia. org/wiki/File: Solar_Life_Cycle. svg http: //en. wikipedia. org/wiki/File: Yohkohimage. gif http: //en. wikipedia. org/wiki/File: Eagle_nebula_pillars. jpg http: //en. wikipedia. org/wiki/File: Crab_Nebula. jpg http: //en. wikipedia. org/wiki/File: Betelgeuse_star_%28 Hubble%29. jpg �Text References "Ask an Astronomer for kids!. " Ask an Astronomer for kids!. Web. 25 Feb 2010. . <http: //coolcosmos. ipac. caltech. edu/cosmic_kids/Ask. Kids/star. shtml>. "Star Types. " Zoom Astronomy. 2010. Enchanted Learning, Web. 1 Mar 2010. <http: //www. enchantedlearning. com/subjects/astronomy/stars/startypes. shtml>.