Question

read the beginning of the section refining the telescope from chapter two of windows to the universe: revolutions in astronomy.

galileo galilei, an italian scientist, is often credited with significantly improving the telescope. by 1609, he had built a version that magnified objects up to 30 times.

which statement best explains the central idea that this excerpt introduces?

technological advancements in telescopes began to accelerate after 1609.
galileos work with telescopes focused primarily on increasing magnification power.
the telescopes development was driven by individual contributions from prominent scientists.
galileos improvements to the telescope greatly advanced humanitys understanding of the universe.

Explanation:

Analyze the provided text

The excerpt states: "Galileo Galilei, an Italian scientist, is often credited with significantly improving the telescope. By 1609, he had built a version that magnified objects up to 30 times."

Evaluate the options against the text

• Option 1: "Technological advancements in telescopes began to accelerate after 1609." (The text does not discuss what happened after 1609.)
• Option 2: "Galileo's work with telescopes focused primarily on increasing magnification power." (The text mentions magnification as a specific detail of his improvement, but the broader central idea introduced by this opening sentence is about individual contributions to its development.)
• Option 3: "The telescope's development was driven by individual contributions from prominent scientists." (The text introduces Galileo Galilei, a prominent scientist, as someone credited with significantly improving the telescope, which sets up a narrative about individual contributions to its development.)
• Option 4: "Galileo's improvements to the telescope greatly advanced humanity's understanding of the universe." (The text does not mention humanity's understanding of the universe.)

Determine the best fit

The excerpt introduces a section titled "Refining the Telescope" by highlighting Galileo's individual contribution. This directly supports the central idea that the development of the telescope was driven by individual contributions from prominent scientists.

Answer:

• Technological advancements in telescopes began to accelerate after 1609.
• Galileo's work with telescopes focused primarily on increasing magnification power.
• The telescope's development was driven by individual contributions from prominent scientists. (Correct answer)
• Galileo's improvements to the telescope greatly advanced humanity's understanding of the universe.