Suppose We Observe a Cepheid Variable in a Distant Galaxy

question 33

Multiple Choice

Suppose we observe a Cepheid variable in a distant galaxy. The Cepheid brightens and dims with a regular period of about 10 days. What can we learn from this observation?

• A)It will allow us to determine the mass of the galaxy.
• B)Under the rules of the International Astronomical Union, we will be entitled to naming rights for the galaxy.
• C)It will allow us to calculate the rotation rate of the galaxy.
• D)We can learn the distance to the galaxy.

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Definitions:

Outline Goals

Preliminary or skeletal goals that provide a general direction without detailing the steps necessary to achieve them.

Merger

The combination of two or more companies into a single entity, with the aim of enhancing competitiveness or expanding market share.

Conciliator

A neutral third party who is informally assigned to persuade opponents to communicate.

Severance

Financial compensation or benefits granted to an employee upon termination of employment, often based on length of service or terms of employment contract.