How Do We Learn About What Is Going on in the Center

question 100

Multiple Choice

How do we learn about what is going on in the center of our own galaxy (the Milky Way) ?

• A)We have learned it only recently,thanks to the great photographs obtained by the Hubble Space Telescope.
• B)We cannot see the galactic center with visible or ultraviolet light,but radio and X-rays from the center can be detected.
• C)The gas and dust in the Milky Way prevent any type of direct observation of the galactic center,but theoretical models allow us to predict what is happening there.
• D)We must look at the centers of other galaxies and hope that ours is just like others.
• E)We can study it with visible telescopes as with any other star in the Galaxy.

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Definitions:

Default

The failure to fulfill an obligation, especially failing to pay back a loan on time.

Surety

is a person or entity that takes responsibility for another's performance, such as fulfilling the terms of a contract or repaying a loan.

Default

Failure to fulfill a legal obligation or agreement, such as not making a payment on a loan by the due date.

Obligation

A duty or commitment to fulfill a contractual, legal, or moral requirement.