The Number of Technological Civilizations in Our Galaxy Is Limited

question 87

Multiple Choice

The number of technological civilizations in our galaxy is limited by

• A)the number of stars in our galaxy.
• B)the fraction of stars with planets.
• C)the number of planets per star in habitable zones longer than a few billion years.
• D)the fraction of suitable planets where technical life forms evolve.
• E)the number of stars in our galaxy, the fraction of stars with planets, the number of planets per star in habitable zones longer than a few billion years, and the fraction of suitable planets where technical life forms evolve.

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Definitions:

Multiracial

An individual or group comprising members from two or more racial backgrounds.

Fluid

Characterizes materials or substances that can flow and do not have a fixed shape, or more broadly, refers to situations or concepts that are flexible and adaptable.

Colorblind Racism

A form of racism that asserts race does not matter and ignores systemic and historical inequities based on race.

Perpetuates

The act of making something continue indefinitely, often referring to social norms, inequalities, or behaviors.