Who Was the First Person to Measure the Parallax of a Star

question 221

Multiple Choice

Who was the first person to measure the parallax of a star successfully?

• A) Sir George Airy in England
• B) Henry Norris Russell in the United States
• C) Tycho Brahe in Denmark
• D) Friedrich Wilhelm Bessel in Germany

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Definitions:

Barriers to Entry

Factors that make it difficult for new firms to enter a market, such as high startup costs, regulatory requirements, and established competitors.

Market Power

The ability of a firm to influence or control the price and quantity of goods or services in a market.

Marginal Revenue

The additional income obtained from selling one more unit of a product or service.

Demand Schedule

A table that shows the quantity of a good or service that consumers wish to buy at each price level.