Astronomers Aim a Radio Telescope at a Distant Region of the Milky

question 42

Multiple Choice

Astronomers aim a radio telescope at a distant region of the Milky Way Galaxy and detect 21-cm radio waves with no Doppler shift. Which one of these possible explanations is NOT correct?

• A) The neutral hydrogen in this region is not moving relative to Earth.
• B) The neutral hydrogen in this region is moving perpendicularly across the line of sight.
• C) The neutral hydrogen in this region is in a circular orbit around the galactic center at the same radius as the solar system.
• D) The neutral hydrogen in this region is moving away from Earth instead of toward Earth.

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Definitions:

Anchoring and Adjustment Heuristic

Bases a decision on incremental adjustments to an initial value determined by historical precedent or some reference point.

Executive

An individual or group of individuals at the highest level of management within an organization, responsible for making major decisions and setting strategic directions.

Base Salaries

The initial rate of compensation an employee receives in return for their services, not including extra benefits, bonuses, or overtime.

Consultative Decision

A consultative decision is made by an individual or leadership after seeking and considering input and advice from others, typically within an organization.