On the Hubble Tuning-Fork Diagram Shown in Figure 17-15 of the Text

question 61

Multiple Choice

On the Hubble tuning-fork diagram shown in Figure 17-15 of the text, the irregular galaxies are placed between the tines at the right end of the diagram. Why is this?

• A) These are the least-massive galaxies, and on the diagram the masses increase from left to right.
• B) These are the youngest galaxies, and on the diagram the ages increase from right to left.
• C) These are the oldest galaxies, and on the diagram the ages increase from left to right.
• D) The placement is somewhat arbitrary.

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Definitions:

Postvention

Activities and support provided after a traumatic event, particularly after a suicide, aimed at helping those affected to cope and heal.

LGBTQ+

An acronym representing Lesbian, Gay, Bisexual, Transgender, Queer or Questioning, plus additional sexual orientations and gender identities.

Suicidal Ideation

Thinking about, considering, or planning suicide.

Dichotomous Thinking

A type of cognitive distortion that involves viewing experiences, people, and situations in extreme, either/or categories.