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Kepler's 2nd Law ( Equal Areas in Equal Times: Variable-Speed Model ) is a fundamental planetary law of motion whether in our solar system or off in the far distant reaches of the universe. It simply states that a line joining a planet and its companion star sweeps out equal areas in equal interval amounts of time.
To allow or block links to the Internet in PDFs: https://helpx.adobe.com/acrobat/11/using/allow-or-block-links-internet.html
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