You Find a Star Orbiting About the Center of the Galaxy

question 81

Essay

You find a star orbiting about the center of the galaxy at a speed of 220 km/s at a distance of 15 kpc. How much mass is within the orbit of that star? You can assume the star is on a circular orbit around the center of the Milky Way.

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Definitions:

Corporation

A legal entity owned by shareholders, with rights and liabilities distinct from those of its owners, and subject to corporate income tax.

AMT Income

Alternative Minimum Tax income calculates income with different rules than regular taxes, aiming to ensure taxpayers with high income pay a fair share of taxes.

Dividend Income

consists of payments received by shareholders from stocks or mutual funds, representing a share of the profits of the corporation or fund.

Taxable Income

The amount of an individual's income that is subject to taxation, after all deductions and exemptions.