| sideral day | the time for the earth to make a 360 spin |
| Jupiter's moon callisto | Galileo Galilei |
| spiral galaxies | Edwin Hubble |
| elliptical orbit of planets | Johannes Kepler |
| between 23 1/2M & 23 1/2S latitude | part of the earth that experiences the Sun directly overhead at noon |
| Sea of Tranqulity | a volcanic lava plain |
| planet with the red spot | jupiter |
| has rings to be studied by Casinni probe | Saturn |
| planet with an atmosphere | Mercury |
| has the tallest volcano of all planets | Mars |
| have dense and rocky crusts | Inner Planets |
| the Roche Limit | relationship explains the location of planetary rings and moons. |
| foucault's pendulum indicates what? | rotation on earth |
| AU is used in... | solar system |
| V | White Dwarfs |
| Z | Sun-like Star |
| X | Red Giant |
| W | Blue-White Giant |
| Milky way | our home galaxy |
| Horse Head | dark nebula |
| Stellar parallax | used to measure distance to stars |
| Planetary nebula explanation | it is the outer shell of a star that experienced a nova expansion |
| Sun Spots | Solar prominences |
| stars are born | in collapsing nebulae |
| size of star is determined | using absolute magnitude |
| Edwin hubble | recongnized sprial nebulae as galaxies |
| Doppler shift lines indicate | galaxies are moving away from a central point |
| Hubble Constant | measurement used to calculate age of universe |
| Nova | a star that suddenly brightens and then fades back its previous magnitude |
| Cepheid Variable Stars | used to determine the distance of nearby galaxies |
| solar wind | causes tails of comets to point away from Sun |
| Nuclear Fusion | presence of Solar Hydrogen and Helium indicates |
| Earth's Magnetic field | protects life from the ravages of solar wind |
| Pulsar | left after super nova explosion. |
| most massive planet | Jupiter |
| has abundant liquid water | Earth |
| polar ice caps of CO2 | Mars |
| no moon | mercury |
| caused by solar wind | aurora borealis |
| cause of meteor showers | remnants of old comets |
| Bode's Law | planet may exist between Mars & jupiter. |
| Bode's Law found | ceres |
| planet lying on its back | uranus |
| has a moon larger than mercury | jupiter |
| slowest spinning planet | Venus |
| has single moon | Earth |
| solar eclipse occurs | occasionaly at noon time during new moon phase |
| primary fuel for nucler fusion | hydrogen |
| ecliptic | plane of our solar system |
| heliocentric model | nicolaus copernicaus |
| law of planetary motion | johannes kepler |
| classified galaxies | edwin hubble |
| spring tide | causes flooding |
| Pluto's moon, charon | farthest moon from Sun |
| Kepler's Law | as planets approach the Sun they increase in velocity. |
| discovered by a telescope | Uranus |
| first to see jupiter's moons | galileo |
| studied earth motions with a pendulum | foucault |
| calculated earth's circumference | Eratosthenes |
| rotates clockwise | venus |
| its moon has nitrogen atmosphere | saturn |
| has thick carbon dioxide atmosphere | Venus |
| has star embedded in them | a bright emission nebula |
| objects that fail to become a star | brown dwarfs |
| outer planets | lower density |
| longest canyon | mars |
| tail of comet | only visible when near sun |
| saturn's moon titan | has nitrogen rich atmoshpere |
| H-R diagrams | absolute magnitude and temperature |
| failed star | brown dwarf |
| red giant star | core collapses, causing rapid heating which expands the outer layers. |