Before the Twentieth Century,astronomers Lacked Knowledge of Something,and This Caused

question 5

Multiple Choice

Before the twentieth century,astronomers lacked knowledge of something,and this caused them to think that the Sun was at the centre of our star system.What was that something?

• A)globular clusters
• B)Cepheid variable stars
• C)the dimming effects of gas and dust
• D)galactic rotation

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Definitions:

Dollar Votes

The “votes” that consumers cast for the production of preferred products when they purchase those products rather than the alternatives that were also available.

Product Market

A marketplace where final goods or services are bought and sold by consumers, businesses, and the government.

Laissez-Faire Capitalism

A hypothetical economic system in which the government’s economic role is limited to protecting private property and establishing a legal environment appropriate to the operation of markets in which only mutually agreeable transactions take place between buyers and sellers; sometimes referred to as “pure capitalism.”

Specialization

The use of the resources of an individual, a firm, a region, or a nation to concentrate production on one or a small number of goods and services.