Astronomers Making Observations in Our Galaxy Have Been Able to Rule

question 14

Multiple Choice

Astronomers making observations in our Galaxy have been able to rule out a number of suggestions for what the dark matter in the Galaxy might be. Which of the following have we NOT been able to rule out (which suggestion is still "in the running") ?

• A) black holes
• B) hydrogen gas that is at low temperatures compared to stars
• C) Jupiter-mass planets or brown dwarfs
• D) large quantities of dust (like we find in nebulae)
• E) a new kind of subatomic particle
• Section 25.4: The Center of the Galaxy

---

Definitions:

Family Structures

The various forms in which a family unit can be organized, ranging from nuclear families to extended families, and including non-traditional configurations.

Therapeutic Work

A type of intervention focused on healing and symptom relief, typically performed by professionals in psychology, counseling, or social work.

Mental Health Service

Programs or interventions designed to support individuals in dealing with psychological, emotional, or behavioral issues.

Arab and Muslim Americans

Individuals in the United States who identify with Arab culture or Islam, encompassing a wide range of cultural backgrounds and experiences.