Given the Presence of Dust Throughout the Disk of the Milky

question 18

Multiple Choice

Given the presence of dust throughout the disk of the Milky Way Galaxy, what is the best technique for learning about more distant regions of our galaxy's disk.

• A) look for blue radiation from stars and nebulae, since the light is reddened
• B) look for red light from stars and nebulae
• C) look for radiation at long wavelengths, for example in the infrared region of the spectrum
• D) look for HII regions, whose high-energy radiation penetrates dust
• E) send a spacecraft to Pluto, from where we can see above the Galaxy's disk

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Definitions:

Ansa Cervicalis

A loop of nerves in the neck that innervates some of the muscles responsible for swallowing.

Muscles of Mastication

The muscles responsible for jaw movement, allowing for chewing and biting of food.

Zygomatic Arch

The bone structure that forms the prominence of the cheek, extending from the zygomatic process of the temporal bone to the zygomatic bone.

Facial Nerve

The seventh cranial nerve that controls the muscles of facial expression, among other functions.