Keplers law - Simmons

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Across
  1. 4. The farthest point from Earth in a satellite's orbit (Earth-centric version of aphelion).
  2. 6. The mathematical operation applied to the orbital period in Kepler's Third Law (T²).
  3. 7. The time it takes a planet to complete one full orbit around the Sun. Area The space swept out by an imaginary line connecting a planet to the Sun over time. Velocity: The speed of a planet in a given direction, which constantly changes throughout its orbit.
  4. 8. A measure of how much an orbit deviates from a perfect circle.
  5. 9. The attractive force between masses that keeps planets locked in their orbits.
  6. 11. Tycho Brahe, the Danish astronomer whose accurate observational data Kepler used.
  7. 13. The oval-shaped geometric path that a planet follows around the Sun.
  8. 14. The star at the center of our solar system that sits at one focus of every planetary orbit.
  9. 16. One of two central points used to define an ellipse; the Sun occupies one of these.
  10. 17. A celestial body moving in an elliptical orbit around a star.
Down
  1. 1. An artificial or natural body that orbits a planet, also following Kepler's laws.
  2. 2. Johannes Kepler, the German astronomer who formulated the three laws of planetary motion.
  3. 3. The plural form of focus.
  4. 5. The mathematical operation applied to the semi-major axis in Kepler's Third Law (a³).
  5. 10. The distance from the center of the Sun to the position of the planet.
  6. 12. Half of the longest diameter of an ellipse, used to calculate orbital periods.Perihelion The point in a planet's orbit where it is closest to the Sun and moving fastest. Aphelion The point in a plane's orbit where it is farthest from the Sun and moving slowest. Perigee The closest point to Earth in a satellite's orbit (Earth-centric version of perihelion).
  7. 15. The longest diameter of an ellipse, running through both foci.