Suppose We Observe a Cepheid Variable in a Distant Galaxy

question 64

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

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Definitions:

Marketing Planning

The process of identifying and targeting specific markets and developing strategies to communicate with and engage those audiences.

Personnel Planning

The process of forecasting an organization's human resource needs and developing strategies to meet these needs, ensuring the right number and type of employees are available when needed.

Standard Error

a statistical measure that gauges the accuracy of sample means by estimating the dispersion of sample means from the population mean.

Forecasting Model

A mathematical or theoretical representation used to predict future values or trends based on historical data.