Which of These Is NOT a Contributor to Librations, the "Nodding

question 22

Multiple Choice

Which of these is NOT a contributor to librations, the "nodding" back and forth of the Moon that allows observers on Earth to see more than half of it?

• A) The Moon's rotation axis is not perpendicular to its orbital plane.
• B) The Moon's orbit around Earth and the ecliptic are not the same plane.
• C) The Moon is not always the same distance from Earth.
• D) Earth does not move at a steady rate in its orbit about the Sun.

---

Definitions:

Regulatory Proteins

Proteins that control the expression of genes or the activity of other proteins, playing crucial roles in the regulation of cellular processes.

Control Activities

Measures and procedures implemented to mitigate risks and ensure that objectives are achieved in any given system or process.

Nutrients

The chemical substances in food that are used as components for synthesizing needed materials and/or as energy sources.

Regulatory Proteins

Proteins that control the expression of genes by enhancing or inhibiting the transcription process.