| A | B |
|---|
| Absolute Magnitude | measure of the amount of light a star actually gives off |
| Apparent Magnitude | measure of the amount of light from a star that is received on earth |
| Aurora Borealis | CMEs that flow past earth's magnetic field and flow toward the Earth's poles |
| Black Hole | all the core's mass collapses to one point and gravity is so strong that nothing can escape not even light |
| Chromosphere | layer of sun's atmosphere above the photosphere |
| Circumpolar constellations | as the earth rotates constellations such as Ursa Major and Ursa Minor circle around Polaris |
| Constellation | A group of stars that form a pattern in the sky that looks like a familiar object (Libra) animal (Pegasus) or character (Orion) |
| Corona | largest layer of the sun's atmosphere |
| Coronal mass ejections | electrically-charged gas that are suddenly ejected from the sun's surface |
| Galaxy | large group of stars |
| Giant | when a star dies the outer layer expands and cools |
| Light year | unit representing the distance light travels in one year used to record distances |
| Nebula | large cloud of gas and dust |
| Neutron star | the collapsed core of a supernova where only neutron's can exist |
| Parallax | the apparent shift in the position of an object when viewed from two locations |
| Photosphere | lowest layer of the sun's atmosphere |
| Prominences | huge arching columns of gas |
| Solar flare | gases near a sunspot that suddenly shoot outward |
| Sunspots | cool dark areas on the surface of the sun |
| Supernova | when the core of a supergiant collapses and explodes |
| White dwarf | end of life for low-mass star a hot dense core |
| The color of a star | blue white=hot stars |
| Spectra | composition of stars |
| Auroras | light in the sky |
