How Do We Know the Total Mass of the Milky

question 5

Multiple Choice

How do we know the total mass of the Milky Way Galaxy that is contained within the Sun's orbital path?

• A)by counting the number of stars visible in this region of the galaxy
• B)by estimating the amount of gas and dust in between the stars
• C)by using the law of conservation of angular momentum to calculate the orbital speeds of nearby stars
• D)by applying Newton's version of Kepler's third law to the orbits of the Sun or other nearby stars around the center of the Galaxy

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Definitions:

Welfare Eligibility

Criteria that determine an individual's or family's qualification to receive assistance or benefits from governmental social welfare programs.

MSC Curve

The Marginal Social Cost curve, illustrating the total cost to society of producing one additional unit of a good.

Emissions

The release of pollutants or greenhouse gases into the atmosphere, often associated with industrial processes or vehicle exhaust.

Technologies

The application of scientific knowledge for practical purposes, especially in industry.