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keplers 1st law of planetary motion
gives the idea that a planet goes around the sun on an ellipse with the sun at one focus of the ellipse
Keplers 2nd law of planetary motion
states that the closer a planet gets to the sun the faster it will go and the line connecting the planet to the sun sweeps out in equal areas in equal intervals of time.
Keplers 3rd law of planetary motion
further a planet is from the sun, the longer it takes for the planet to revolve around the sun.
the (usually elliptical) path described by one celestial body in its revolution about another
how bright a star will be in relation to the sun if all of the stars were the same distance from the person watching
a diagonal area on an H-R diagram that includes more than 90 percent of all stars in the solar system
change in the apparent frequency of a wave as the observer and source move toward or away from each other
a form of energy that exhibits wavelike behavior as it travels through space
electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
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