Cross Word

1. A glowing sphere of gases that produces light through nuclear fusion reactions.
3. A high energy, high temperature form of matter. Electrons are removed from atoms, leaving each atom with a positive electrical charge.
5. A violent explosion on the Sun’s surface.
8. Layer of the Sun that surrounds the radiative zone where energy moves as flowing cells of gas.
10. The visible surface of the Sun.
12. A group or cluster of stars that appear close together in the sky.
14. Stage in a star's development when the inner helium core contracts while the outer layers of hydrogen expand.
15. Layer of the Sun immediately surrounding the core where energy moves atom to atom as electromagnetic waves.
16. Thin layer of the Sun’s atmosphere that lies directly above the photosphere; glows red.
18. The remnant of a massive star after it explodes as a supernova.

1. Plasma loop flowing between sunspots.
2. The super dense core left after a supergiant explodes as a supernova.
4. Outermost layer of the Sun; a plasma that extends millions of kilometers into space.
6. A particle of light.
7. When nuclei of two atoms fuse together, giving off tremendous amounts of energy.
9. A star that is fusing hydrogen atoms to helium; a star in the main portion of its “life.”
11. A tremendous explosion that occurs when the core of a star is mostly iron.
13. The merging together of the nuclei of atoms to form new, heavier chemical elements
17. A method used by astronomers to calculate the distance to nearby stars, using the apparent shift relative to distant stars.