2. What is a star? A big ball of gas & nuclear fusion

3. Nuclear fusion is the explosion of energy when atoms combine. ** Intense gravity fuses Hydrogen into Helium

4. Man made nuclear fusion

5. Star sizes

6. The color of stars indicates the temperature of stars - blue is hottest - red is coolest

7. Binary star system is a star system with two stars

8. A scatter scatter graph that shows the relationship between star’s absolute magnitudes and temperature of the stars. *** Known as a H-R Diagram

9. The Sun

10. Is a middle size class G star.

11. Sun spots Areas of the sun where the gas is cooler.

12. Coronal Mass Ejections Large amounts of electrically charged gas are ejected suddenly from the Sun’s corona. Can cause disruption in satellite transmissions or even shut down all electro-magnetics.

13. Solar flares Explosion of gas from the Sun’s surface

14. Solar prominences Loops of gas connecting sun spots.

15. Birth of stars The gas and dust are pressed together until nuclear fusion occurs. Stars are born when the dust and gas of a NEBULA are pulled together by gravity.

16. Proto star The earliest stage of a star. (Baby star)

17. Nebula Stellar cloud of gas and dust. The birthplace of stars

18. Birth of stars

19. Star death A star dies when it runs out of fuel

20. How long a star lives depends on the amount of mass it has. Big stars burn fuel faster

21. A light year is the distance light travels in one year. is measured In light years. Stars distance

22. How can we measure star distances?

23. Parallax The apparent movement of stars Based on the change in Earth’s position Uses the principle of triangulation.

24. Apparent magnitude How bright a star appears to be

25. Absolute magnitude How bright a star actually is.

26. Fate of Stare

27. Small and middle size stars expand out into red giants and then shrink into a White dwarf

28. A white dwarf is a very small and cool, formed when middle size stars die

29. Giants and super giants can blow up into a supernova An exploding star

30. The remains of a supernova can become either a neutron star or a black hole

31. Neutron star Dense remains of a super nova that is smaller than a white dwarf

32. Black hole A dense area of space where gravity is so strong that everything is sucked into it.

33. Our suns will expand out into a red giant and then collapse into a white dwarf.

34. Constellations The arrangement of stars in patterns

35. Galaxies A massive cluster of stars

36. Types of Galaxies

37. Shaped like a spinning pinwheel Chart designation: "S" to stand for spiral galaxies Spiral

38. Barred Spiral Galaxy A spiral with a solid bar across the center. Chart designation: "SB" to stand for barred spirals.

39. elliptical Shaped like an oval disk Chart designation: "E" to stand for elliptical galaxies.

40. Irregular No definite shape Galaxies that can't be classified as either spiral or elliptical are called irregular galaxies.

41. Our galaxy is the Milky Way The Milky Way is a spiral galaxy

44. History of the universe The universe is said to have begun with the Big bang

45. Big Bang Theory All matter blow out from a beginning point

46. The universe is continuing to expand

47. It is thought that the universe will collapse into nothingness