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Solar System& Uni
Earth sic vocab
Term | Definition |
---|---|
Asteroid | A small rock orbiting the sun |
Axis | An invisible line that an a object rotates around |
The big bang theory | How astronomers explain the start of the universe and how one single point expanded |
Comet | A cosmic snowball of frozen gasses and dust that orbits the sun |
Day | A time of of period when the earth goes around the axis for about 24 hours |
Doppler affect | change in frequency of a wave for an observer moving like it's source |
Eccentricity | Measure of how oval a orbit is shaped |
fission | energy being put out and splits an atom into two |
Focus/Foci | The two points of an ellipse that determines the shapes curve |
Galaxy | A huge collection of gas,dust,stars, in their solar system |
Geocentric model | An theory of how the structure of the solar system, in which the earth is assumed to be at the center |
Gravity | universal pull between all matter |