| A | B |
|---|
| The Big Bang | The universe expanded from a single point |
| Red Shift | Spectral lines spread out |
| Blue Shift | Spectral lines squish together |
| Wavelength | Space between two waves |
| Nebula | A giant cloud of dust and gas |
| Star | A giant sphere of plasma |
| Black Hole | An incredibly dense gravity well |
| CMB (abbreviation) | Cosmic Background Radiation |
| CMB (definition) | Energy leftover from the big bang |
| Supernova | The giant explosion caused by a red giant imploding |
| Hubble's Law | Galaxies further from Earth move away faster |
| Spectral Lines | tell astronomers what a star is made of |
| 13.8 billion years | The age of the universe |
| Light Elements | Hydrogen, Helium, and Lithium |
| EM | Electromagnetic |
| Radiation | Emitted energy or particles |
| Galaxy | A collection of solar systems |
| Nuclear Fusion | nuclei are forced together, releasing energy |
| Core | Innermost layer of the sun; where fusion takes place |
| Sol | The name for our sun |
| Sunspot | A "cool" region on the surface of the sun |
| Solar Wind | Stream of particles ejected from the corona |
| Corona | Outer atmosphere of the sun |
| Black Hole (life cycle) | End stage of only the most massive stars |
| White Dwarf | The leftover core of a red giant; it still glows |
| Black Dwarf | The cold, dark, inert core of a red giant |
| Stellar Nebula | The leftovers of a red giant's expansion |
