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Planetary Motion
Stack #133297
| Question | Answer |
|---|---|
| Astronomical Unit | unit used 2 describe atronomy (lightyears) |
| morning stars | planets only seen in the morning before sunrise |
| evening stars | planets only seen in the evening after sunset |
| asteroid | small rocky ob. that orbits sun (between Mars & Jupiter mostly) |
| comet | small body of ice rock & comic dust loosely packed. follows orbit |
| meteoroid | small bodies ,often remains of comets |
| meteor | when a meteoroid is in the Earth's atmosphere&heated to luminosity |
| meteorite | a mass of stone or medal that has reached Eath from outerspace. (a fallen meteoroid) |
| celestial sphere | imaginary sphere used to locate stars & other celestial objects |
| ecliptic | path followed by sun |
| zenith | point directly above an observer |
| meridian | imaginary line that crosses Zenith at noon |
| celestial equator | extension of our equator |
| declination | angular distance above our horizon |
| right ascension | number of hours eastward from vernal equinox |
| constellation | a group of stars that's a pattern |
| Polaris | altitude equals your North latitude |
| aphelion | postion farthest from sun |
| perihelion | portion closest to sun |
| retrograde motion | the apparent backing up of a planet as viewed from Earth |
Created by:
bid2011
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