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Module 16
Module 16 Vocabulary
| Question | Answer |
|---|---|
| Core | The middle of the sun |
| Radiative Zone | The are of the sun, surrounding the core |
| Convection Zone | Part of the sun, surrounding the Radiative Zone |
| Photosphere | The surface of the sun, surrounding the Convection zone |
| Solar flare | A large amount of fire that spurts out from the sun |
| Nuclear Fusion | The process by which two or more small nuclei fuse to make a bigger nucleus |
| Nuclear Fission | The process by which a large nucleus is split into to smaller nuclei |
| Chain Reaction | When one action tirggers a whole line of other actions |
| Critical Mass | The amount of Isotope necessary to get a chain reaction |
| Meltdown | When a nuclear reactor overheats and kills itself |
| Spectral Letter | The seven star classes |
| Star magnitude | The brightness of a star on a scale of -8 to +17, the smaller the number the brighter the star |
| Hertzsprung - Russell Diagram | The chart used to classifie stars |
| Main Sequence | Stars the go in a diagnal line across the H-R Diagram |
| White Dwarfs | A small group of stars below thye main sequence stars |
| Red Giants | A group of stars above the main sequence |
| Supergiants | A group of stars above the Red Giants |
| Variable stars | A star who's vertical position continually changes |
| Pulsating Variables | A type of Variable star |
| Novas | The result of an explosion within a star |
| Supernova | A larger version of a nova |
| Nebula | The debri left behind from a nova |
| Crab Nebula | The debri that was formed in a supernova explosion |
| Binary Stars | Two stars that orbit each-other |
| Eclipsing binary stars | When two stars eclipse eachother |
| Parallax method | When geometry and positioning is used to measure the distance between the earth and a star |
| Apparent magnitude method | When the size of a star and other objects around it are measured to find the distance between a the earth and that star |
| Light years | The distance light travels in a year |
| Galaxy | A massive ensemble of hundreds of millins of stars, all interacting through the gravitational force, orbiting around a common center |
| Milky Way | Our galaxy |
| Spiral Galaxy | A flat circular galaxy that has long "arms" spiraling out of it's side |
| Elliptical Galaxy | A large orb shaped galaxy |
| Lenticular Galaxy | Large disk shaped galaxies |
| Nucleus | The bright spot at the center fo a galaxy |
| Irregular galaxy | A galaxy that does not fit into the description of the three main galaxies |
| Orion Arm | The part of the milky way that our sun is in |
| Local Group | A small group of galaxies that the milky way is part of |
| Clusters | A group of Groups |
| Virgo Cluster | The Cluster that the Local Group is part of |
| Superclusters | A lgroup of Clusters formed together to create a larger cluster |
| Great Wall | A large, long filament of stars |
| Spectral lines | Wavelengths of light that are emitted by elements that are excited |
| Red Shift | Red beams of light seen from other galaxies |
Created by:
sgt. apone