Relativity Calculator
Kepler's 2nd Law: Equal Areas in Equal Times.
The Law of Equal Areas states that a line joining a planet and its star sweeps out equal areas during equal intervals of time.
• Planet = yellow circle
• Blue arrow = initial condition
• Red arrow = moving planet and is proportional to planet's velocity
• Closer to the sun, the faster the planet passes in its transit orbit
• Further from the sun, the slower the planet passes in its transit orbit
[ note: The last two observations hold because of Kepler's 2nd Law of Equal Areas where a planet sweeps out equal areas during equal intervals of time. ]
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