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Solar system
| Term | Definition |
|---|---|
| Astronomical unit | Used to measure far distances in space 1 AU=92,955,807.273 mi Distance from earth to sun |
| Meteoroid | Chunks of rock smaller than an asteroid |
| Meteor | Streak of light |
| Astroids | Millions of small, rocky objects that orbit the Sun in the asteroid belt between mars and Jupiter |
| Meteorite | Space rocks found on earth |
| Comet | Made of gas, dust, ice, revolves around the sun in the Kuiper Belt |
| Inner planets | ° Terrestrial planets ° Solid and rocky °Mercury, Venus, Earth, Mars |
| Outer planets | Gas giants Made of ice and gas Jupiter, Saturn, Uranus, Neptune Rings and moons Hydrogen and helium |
| Jupiter | Largest planet Galilean moons Great Red Spot |
| Saturn | Most complex ring system Least dense planet it would float Home of Titan |
| Uranus | Rotation axis is tilted 90 degrees so rotates like a bowling ball |
| Nepune | Longest period of Revolution Swriling storms windiest planet |
| Gas giants | Jupiter Saturn, Uranus, Neptune, Nickname for the 4 outer planets |
| Galilean moon | 4 moons Galileo discovered around Jupiter I.ok Europa, GANYMEDE, Callisto |
| Dwarf planet | Pluto was the first same as planet but not as large Ceres in the asteroid belt. |