The Point in a Lunar Orbit Nearest the Surface of the Moon

question 46

Short Answer

The point in a lunar orbit nearest the surface of the moon is called perilune and the point farthest from the surface is called apolune. The Apollo 11 spacecraft was placed in an elliptical lunar orbit with perilune altitude $106 \mathrm {~km}$ and apolune altitude $318 \mathrm {~km}$ (above the moon). Find an equation of this ellipse if the radius of the moon is $1728 \mathrm {~km}$ and the center of the moon is at one focus.

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Definitions:

Increasing

A process or trend of becoming progressively larger or greater over time.

Managed-Care Organizations

Health insurance groups that provide healthcare services to their members through specific networks of doctors and hospitals under a fixed budget.

Control Health Care Costs

Efforts and measures taken to manage and reduce the expenses associated with health care services and treatments.

Two Main Types

Often refers to the classification of something into two broad, distinct categories; the specific context (e.g., of products, economic systems) defines what these are.