Given That There Are Several Hundred Billion Stars in the Milky

question 63

Multiple Choice

Given that there are several hundred billion stars in the Milky Way Galaxy and preliminary data from exoplanet studies suggest that as many as one in five star systems may have one or more habitable planets, then a reasonable estimate for the number of habitable planets could be about

• A) 100 billion or more
• B) 1 billion or more
• C) 100 million or more
• D) 10 million or more

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Definitions:

Unintentionally

Performing actions or making decisions without conscious planning or purpose.

Ethnocentric

Holding the belief that one's own culture, nation, or ethnicity is superior to others.

Apathetic

Showing or feeling no interest, enthusiasm, or concern; a lack of emotion or passion.

Double-Checking

The practice of verifying accuracy or completeness of information, work, or calculations more than once to ensure correctness.