What Surprising Conclusion About the Distribution of Mass in Our

question 96

Multiple Choice

What surprising conclusion about the distribution of mass in our Galaxy has resulted from a study of orbital speeds across the galactic disk?

• A) Most of the mass in the Galaxy is dark and is detected only by its gravitational influence.
• B) Most of the mass of the Galaxy is in the form of hydrogen gas and giant molecular clouds in the outer region beyond the Sun's orbit.
• C) Most of the Galaxy's mass is concentrated in a supermassive nucleus at the center of the Galaxy.
• D) Most of the mass in the Galaxy is in the form of O and B stars.

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Definitions:

Lessee

A person or entity that leases an asset from another, obtaining the right to use that asset in exchange for periodic lease payments.

Short Notice

A term indicating that something is happening or is required to happen with minimal warning or preparation time.

Financial Lease

A type of lease where the lessee essentially rents an asset for most of its useful life and the lease terms closely resemble the conditions of outright ownership.

Long-term

Refers to an extended period of time, typically over one year, used in the context of investments, loans, or planning, indicating a focus on future benefits rather than immediate outcomes.