| A | B |
|---|
| apparent magnitude | appearance of a star from Earth |
| absolute magnitude | star look if lined up at a standard distance |
| beginning of a star | dust cloud & gas -> nebula |
| star identification | is a color scale based on temperature |
| geocentric model | shows earth in center of Solar System |
| heliocentric model | shows sun in center of Solar System |
| naked eye | used to view space prior to telescopes |
| solar system | collection of celestial bodies orbiting a central star |
| religion | reason geocentric model was rejected |
| sunspot | darker areas found on surface of sun w/ cooler temps |
| solar flares | energy explosions w/ high temps released from sun's outer atmosphere |
| prominences | giant loops of cooler gas projecting out of the photosphere |
| parallax | appearance of a shift of an object that occurs when viewed from another location |
| Geocentric Model | Plato; Eudoxus; Aristotle; Ptolemy |
| Heliocentric Model | Aristarchas; Copernicus; Kepler; Galileo; Newton |
| nuclear fusion | Einstein's formula (E=mc2) explains... |
| nuclear fusion | hydrogen combining - produces helium / occurs in the core |
| planetary nebula | takes places as a star blows off its outer atmosphere |
| protostar | star @ beginning stages |
| brown dwarf | failed star |
| white dwarf | glows from residue heat left after burning out |
| larger stars have... | more fuel / burn faster |
| smaller stars have... | less fuel / burn slower |
| stars that collapse b/c | burn off all fuel |
| binary star | 2 star system held by gravity |
| variable star | young & old stars that have changing brighntess |
| main sequence star | star that maintains stable nuclear reactions |
| main sequence star | these stars fluctuate by temp & mass |
| main sequence star | lifespan is determined by the mass |
| star temperature | determined by color |
| hotter stars | blue in color |
| cooler stars | red in color |
| sun size | 110 x larger than Earth |
| sun composition | 74% helium, 25% hydrogen, 1% other gases |
| 8 minutes | time sun's light reaches Earth |
| energy produced = | visible, ultraviolet, infrared light |
| rotation of sun | 35 days @ poles & 25 days @ equator |
| nuclear fusion | sun's way of producing energy |
| core | dense center where nuclear fusion happens |
| photosphere | visible layer of the sun |
| corona | sun's layer that extends into space |
