In 1974,astronomers Sent a Message Toward Globular Cluster M13

question 18

Multiple Choice

In 1974,astronomers sent a message toward globular cluster M13.If life exists there,and it returns our signal,we won't receive it for at least another 48,000 years.Why not?

• A) It will take that long for the space probe carrying our signal to reach the life forms there.
• B) Based on the age of the stars in M13,we anticipate it would take that long for a civilization to evolve enough to interpret and respond to our signal.
• C) M13 is far enough away that even light takes a very long time to reach it.
• D) It will take that long before our Solar System and M13 are properly aligned again.

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Definitions:

Profitability Index

A financial metric that calculates the relationship between the present value of future cash flows and the initial investment cost.

Preference Rule

A guideline or rule that prioritizes alternatives based on certain criteria, often used in decision-making processes.

Nominal Cost

The cost expressed in current monetary terms without adjustment for inflation, often contrasted with real cost.

Expected Inflation

The anticipated rate at which the general level of prices for goods and services will rise over a period.