What Observed Property of the Milky Way Suggests That It

question 77

Multiple Choice

What observed property of the Milky Way suggests that it must contain a large amount of matter not in the form of stars, gas, or dust?

• A) the rotation curve
• B) the velocities of the open star clusters
• C) the number and shape of the spiral arms
• D) the thickness of the disk
• E) the presence of a supermassive black hole at the galactic center

---

Definitions:

S&P 500

A financial index measuring the performance of the top 500 large-cap companies on U.S. stock exchanges.

Market Value Weight

An investment strategy that involves constructing a portfolio where each asset is weighted according to its market capitalization.

Open-end Mutual Funds

Investment funds that continually issue new shares and buy back existing shares from investors, without a fixed number of shares.

Guaranteed Rate

A fixed interest rate agreed upon in a financial contract, ensuring that the rate will not change for the contract's duration.