Most of the Stars We Can See with the Unaided

question 18

Multiple Choice

Most of the stars we can see with the unaided eye from Earth are

• A) intrinsically fainter than the Sun
• B) very close to us (among the closest stars)
• C) more luminous (intrinsically brighter) than the Sun
• D) only visible to our eyes because they actually consist of three or more stars blending their light together
• E) undergoing some sort of explosion which makes their outer layers unusually bright

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Definitions:

Energy

The capacity to do work or produce changes within a system, present in various forms such as kinetic, potential, thermal, etc.

Chemicals

Substances produced by or used in a chemical process, often referring to synthetic compounds.

Ecosystem

A biological community of interacting organisms and their physical environment, interconnected through nutrient cycles and energy flows.

Homeostasis

The self-regulating process by which biological systems tend to maintain stability while adjusting to conditions that are optimal for survival.