Essay

Documenting Pluto's Orbital Equation for a Science Museum Exhibit

Imagine you are an educational exhibit designer at a science museum preparing an informative display panel about Pluto's orbit. To ensure mathematical accuracy for visitors, you must document how the elliptical orbit of Pluto is modeled using a standard Cartesian coordinate system.

In the mathematical model selected for the exhibit, Pluto's orbit is centered at the origin, the vertices are located at the coordinate points (-40, 0) and (40, 0) in astronomical units (AU), and the Sun is positioned at a focus point of (10, 0).

Write a short essay response for the display guide that outlines the following key aspects:

  1. State the algebraic relationship between the semi-major axis aa, the semi-minor axis bb, and the focal distance cc that is used to find the denominator for the y2y^2 term in the standard elliptical equation.
  2. Recall the specific values of aa and cc given in this model, and show the step-by-step substitution to calculate the numerical value of b2b^2.
  3. State the final standard form equation representing Pluto's orbit in this coordinate system.

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Updated 2026-06-03

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