An Astronomer Needs to Measure the Distance to a Globular

question 25

Multiple Choice

An astronomer needs to measure the distance to a globular cluster of stars that is part of the Milky Way Galaxy. What method should she try to use to find the distance?

• A) measure the parallax of the cluster
• B) count the number of O and B type stars in the cluster
• C) look for flickering x-rays coming from a black hole in a binary star system in the cluster
• D) measure the red-shift of the cluster
• E) find a variable star (cepheid or RR Lyrae) in the cluster

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Definitions:

Depreciation Rate

The rate at which an asset is depreciated over a specified period, often expressed as a percentage of its original cost.

Revaluation

The process of adjusting the book value of an asset or liability to reflect its current fair market value.

Prospective Depreciation

Depreciation calculated from the current period forward, taking into account changes in asset value or estimated useful life.

Economic Benefits

Future returns or advantages from owning an asset or from a transaction.