1. Formation of Stars

2. FUN FACT:
The elephant is the
only mammal that
can't jump!

3. A star is a body of gas Made up of mostly hydrogen and helium
A star is a body of gas Made up of mostly hydrogen and helium. It gives off energy, through fusion, in the form of heat and light.

4. Astronomers can determine the mass, age, chemical composition and many other properties of a star by observing its spectrum, luminosity (how bright), temperature and motion through space.

5. The determining factor in the life of a star is its MASS
The determining factor in the life of a star is its MASS. The more massive a star, the greater its energy output and the faster it evolves.

8. Largest known star in our Universe

9. Stages of a stars life:

10. The stages that a star goes through depends on its mass
The stages that a star goes through depends on its mass. All stars go through the first 4 stages and then its mass plays an important part in its final outcome.

11. Nebula is a Cloud of dust and gas that contains every known element

13. Protostar:
Nebula spins and starts to shrink the force causes matter to go into the center of the disk causing an increase in temperature.

15. Main Sequence Stage

16. The longest stage of a stars life
The longest stage of a stars life. As the star collapses the temperature and pressure at the core increases. Which causes fusion to begin.

17. This reaction converts hydrogen into helium
This reaction converts hydrogen into helium. This in turn heats up the star and halts the collapse. This phase remains relatively stable for a long time. (about 10 billion years)

18. REDGIANT

19. All the hydrogen has fused
All the hydrogen has fused. Without Hydrogen the star contracts under its own gravity. This high pressure causes the helium to fuse into carbon. This causes the outer shell to expand.

21. The red giant stage will last about 1,000 years
The red giant stage will last about 1,000 years. And its mass will determine what stage is next.

23. If it’s a medium sized star like our sun, it will turn into a white dwarf.

24. With energy no longer available, the star begins to cool and contract.
White Dwarf
With energy no longer available, the star begins to cool and contract.

25. The shrinking allows the star to emit light but is no longer producing anything.

27. This is when a white dwarf no longer emits energy.
Black Dwarf
This is when a white dwarf no longer emits energy.

28. OR If the star contains a lot of mass. After the Red Giant stage
OR If the star contains a lot of mass. After the Red Giant stage. The star would turn into a;

29. Is when a red giant expands so big that it blows itself apart.
Supernova
Is when a red giant expands so big that it blows itself apart.

31. Depending on the mass of the supernova, the next stage can be one of two ways.

33. If it is not a huge explosion; the Supernova’s own gravitational pull, pulls back most of the material into a very small dense ball of matter, called a:

34. Neutron Star:

35. the typical mass is 1.4 times that of the Sun, and a diameter of about 12 miles.
1 tsp.= 100 million tons
Or 20 million elephants .

36. If it is a large supernova, causing a huge explosion the gravitational pull is so great on the material that the only thing left is a black hole!!

37. Gravitational pull is so great not even light can escape from a black hole!

38. It has been calculated that black holes have a mass equal to that of 3 billion Suns !!!!

39. Life Cycle of a Star

40. Brain Teaser

41. What can bring back the dead; make us cry, make us laugh, make us young; born in an instant yet lasts a life time?