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| Center of the sun. Dense gas. Extreme heat. Fusion |
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| Only star in our solar system. Much bigger than planets. Mostly made of hydrogen gas. |
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| When hydrogen collides and combines to form helium in the middle of the sun, the core. |
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| Thick layer of the sun. Hot and dense, but not enough to cause fusion. Energy from core radiates through this zone |
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| area of sun were energy is moved by convection currents of hot gas |
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| Visible layer of the sun's atmosphere |
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| Thin, middle layer of the sun's atmosphere |
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| Sun's atmosphere outermost layer, has very low density. |
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| Spots on the photoshere that are cooler areas and appear dark |
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| The electrically charged particles flowing in all directions from the corona |
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| Unit of distance used to describe the distances between stars. Equal to 6 trillon miles. |
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| The apparent shift in the position of an object when viewed from different locations |
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| Clouds of gas and dust that stars form inside of |
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| Lower mass stars' Life Cycle |
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Definition
| Nebula---Main Sequence---Giant star--- White dwarf |
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| Higher mass stars' Life Cycle |
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Definition
| Nebula---Main sequence---Supergiant---Supernova---Neutron star or black hole |
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| Collapsed core of a supergiant star, extremely dense |
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| A core left behind from a supernova that collapses even further forming an invisible object with strong gravity |
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| Huge group of stars, gas and dust held together by gravity |
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| spiral pattern of "arms" of stars, gas and dust curving away from the center. Example--Milky Way |
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| Shaped like eggs or spheres. Have almost no dust or gas between the stars |
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| Faint, smaller galaxies without a definite shape and with fewer stars |
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| The very bright center of some distant galaxies |
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| Occurs with both light and sound waves when there is movement by either the light/sound waves or the observer of those light/sound waves |
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| the moment when the universe started to expand |
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