In Order to Measure the Speed of the Sun with Respect

question 29

Multiple Choice

In order to measure the speed of the Sun with respect to the center of the Galaxy, it was necessary to establish a rest frame. What was used to establish this frame?

• A) the average of several nearby galaxies
• B) the globular clusters in the halo because they remain at rest while the Galaxy rotates beneath
• C) the globular clusters in the halo because their velocities must average to zero
• D) the Great Attractor because its enormous mass acts like a stationary point

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Definitions:

NADH

Nicotinamide adenine dinucleotide (reduced form) is a coenzyme found in all living cells, involved in redox reactions, carrying electrons from one reaction to another.

Ketone Bodies

Compounds, including acetone, acetoacetic acid, and beta-hydroxybutyric acid, that are produced as by-products when fatty acids are broken down for energy in the liver and kidney.

Urine

A liquid by-product of metabolism in humans and many animals, excreted by the kidneys and stored in the bladder until elimination.

Fatty Acids

Long chains of hydrocarbon molecules that are important components of lipids in the body, serving as a major source of energy and playing roles in cell membrane structure.