Extra Credit Stars/Galaxies

5. The bright band across the night sky made by our galaxy’s disk.
6. Layer of the Sun where energy is transported by convection.
9. Explosive death of a massive star.
11. Type of spiral galaxy that has a central bar running through it.
13. Central layer of the Sun or star where nuclear fusion occurs.
14. Layer of the Sun where energy moves outward by radiation.
18. Graph showing the relationship between a star’s brightness and temperature.
21. Galaxy shaped like a football or egg — little gas or dust, mostly old stars.
22. Distance light travels in one year.
23. Stream of charged particles released from the Sun’s corona.
26. Glowing shell of gas ejected from a star near the end of its life.
27. Hot, dense remnant core of a star after it sheds its outer layers.
28. Outermost layer of the Sun’s atmosphere, visible as a halo during an eclipse.
29. Element produced in stars through hydrogen fusion.

1. Extremely dense remnant left behind after a massive star explodes.
2. Visible surface of the Sun.
3. Region of space where gravity is so strong that not even light can escape.
4. Main element stars fuse during most of their lives.
7. Large group of galaxies held together by gravity.
8. Bright central region of a galaxy powered by a supermassive black hole.
10. Galaxy with no definite shape, often chaotic-looking.
12. Large, bright, and cool star near the end of its life cycle.
15. Sudden eruption of energy on the Sun’s surface.
16. Early stage of a star before nuclear fusion begins.
17. The name of our own galaxy.
19. Flat, rotating type of galaxy with arms spiraling outward.
20. Massive system of stars, gas, and dust bound together by gravity — our home is one of these.
24. Stage in a star’s life where hydrogen fusion occurs in the core.
25. Dark, cooler area on the Sun’s surface caused by magnetic activity.