If RR Lyrae Stars in a Globular Cluster Had an Apparent

question 15

Multiple Choice

If RR Lyrae stars in a globular cluster had an apparent magnitude of 11.5 and an absolute magnitude of 0.5, what would the globular cluster's distance be?

• A) 1,600 pc
• B) 1,900 pc
• C) 2,500 pc
• D) 3,200 pc
• E) 8,600 pc

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Definitions:

Rapid Cycling Mania

A pattern in bipolar disorder characterized by four or more episodes of mania or depression within a year.

Short Cycling Bipolar Disorder

A form of bipolar disorder characterized by rapid transitions between manic and depressive episodes without the typical intervening periods of stability.

Bipolar I Disorder

A mental health condition characterized by extreme mood swings that include emotional highs (mania or hypomania) and lows (depression).

Bipolar II Disorder

A mood disorder characterized by a pattern of depressive episodes and hypomanic episodes, but not the full-blown manic episodes associated with Bipolar I Disorder.