Unit 2 Space

4. the final phase of a med/low mass star’s life, does no fusion
6. model of the solar system with the Earth at the center
7. smallest unit of matter
8. subatomic particle in the nucleus of an atom with a positive charge
11. planet with the longest revolution
15. a baby star
16. when the eccentricity is closer to one the ellipse is _______
20. larger cores of high mass stars become a ____________ at the end of their life
21. planet with the shortest rotation
24. which element has 117 protons?
26. horizontal/x-axis of the HR diagram
27. energy that moves through space as a wave is ___________ radiation
28. which element has 97 protons?
30. phase of a star’s life that fuses helium to iron
33. the moon is a natural ____________ of the Earth
34. star phase that fuses hydrogen to helium
36. object with more mass will have a(n) (increase or decrease) in gravitational pull
38. the rocky inner planets are classified as ____________
41. which element has 83 protons?
43. force that draws objects towards the center
44. planet that is outside of our solar system
45. ball of gas held together by its own gravity
46. smaller cores of high mass stars become a _____ ______ at the end of their life
48. ___________ space station (I.S.S.)
49. the gaseous outer planets are classified as ____________
50. dark flat plains of the moon
51. bright elevated spots of the moon

1. violent explosion at the end of a high mass star’s life
2. birthplace of all stars, a cloud of gas and dust
3. a device that takes incoming light and separates it by wavelength and frequency
4. gravitational pull on mass
5. planet with the shortest revolution
9. an object that is farther away will have a(n) (increase or decrease) in gravitational pull
10. vertical/y-axis of the HR diagram
12. star phase that fuses helium to carbon
13. Heat, _________, and energy are produced from nuclear fusion
14. shape of an orbit
17. color of star with the longest lifespan
18. object going around another object
19. bowl shaped depression
20. color of star with the shortest lifespan
22. planet with the longest rotation
23. modern model of the solar system with the sun at the center
25. combining two atoms to form a heavier atom, stars do this
29. when the eccentricity is closer to zero the ellipse is ________
31. ratio that tells us the shape of an ellipse
32. ________ theory of the formation of the solar system
35. exploration technique that makes far away objects appear closer
37. laws that all orbiting bodies follow
39. object spinning around a central axis
40. luminosity of the sun
42. the amount of matter something is made of
47. widest point of an ellipse