If Interstellar Dust Obscures Our View of Distant Regions of Space

question 113

Multiple Choice

If interstellar dust obscures our view of distant regions of space at optical wavelengths,which statement is TRUE?

• A) The obscuration is very clumpy and random over the whole sky; the individual absorbing dust clouds show no preference for one particular direction or plane.
• B) The obscuration is roughly uniform over the whole sky.
• C) The obscuration is the least in the plane of the Milky Way Galaxy and is strongest when we look out into the galactic halo, at right angles in this plane.
• D) The obscuration is severe only in the plane of the Milky Way Galaxy.

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Definitions:

Long-Term Energy

Refers to energy storage or potential energy resources that can be utilized over an extended period.

Unsaturated Fatty Acid

A type of fatty acid that contains one or more double bonds in its hydrocarbon tail, leading to lower melting points than saturated counterparts.

Saturated Fatty Acid

A type of fatty acid with no double bonds between the carbon atoms in the chain, leading to a maximum number of hydrogen atoms bonded to carbons.

Lecithin

A fatty substance found in plant and animal tissues that is utilized as an emulsifier in food products.