The Possible Presence of a Very Large Amount of Unseen

question 20

Multiple Choice

The possible presence of a very large amount of unseen ("dark") matter in the halo of our Galaxy is deduced from the

• A) unexpected absence of luminous matter (stars,etc. )beyond a certain distance.
• B) rotation curve of our Galaxy,which indicates higher than expected orbital speeds in the outer regions of the Galaxy.
• C) rotation curve of our Galaxy,which shows that orbital speeds in the outer parts of the Galaxy decrease in a way that follows Kepler's law.
• D) unexpected high amount of interstellar absorption in certain directions.

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Definitions:

Compassionate Love

Feelings, cognitions, and behaviors that are focused on caring, concern, tenderness, and an orientation toward supporting, helping, and understanding the other.

Companionate Love

A form of love characterized by deep affection, emotional closeness, and commitment, often found in long-term relationships.

Infatuation

An intense but short-lived passion or admiration for someone, often mistaken for love.

Relationship Strategy

A planned approach to building, maintaining, or improving relationships through specific actions and behaviors.