The Image of Our Galaxy in Radio Emission from Carbon

question 4

Multiple Choice

The image of our galaxy in radio emission from carbon monoxide maps the distribution of molecular clouds. Which of the following would give a similar picture of our galaxy?

• A) 21-cm-line radio emission from atomic hydrogen.
• B) visible light, showing the edges of supernova bubbles.
• C) visible light, which is closest to how the night sky appears from Earth.
• D) X-rays from hot gas bubbles in the disk.
• E) infrared emission from interstellar dust grains.

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Definitions:

Short Run

A period in economic analysis where at least one input is fixed and cannot change.

Aggregate Supply

The total supply of goods and services that firms in an economy are willing to produce and sell at a given overall price level, during a certain time period.

Aggregate Demand

Total inclination for products and services within an economic system, priced at a determined aggregate price level over an appointed period.

Price Level

The general level of prices for goods and services in an economy at a specific point in time.