The Hipparcos Satellite Was Able to Measure Parallax for Stars

question 222

Multiple Choice

The Hipparcos satellite was able to measure parallax for stars out to about 150 pc. This distance includes roughly 2.5 million stars. The new Gaia satellite should be able to measure the parallax of roughly a billion stars. Assuming the density of stars is approximately constant, what distance would this correspond to? (Hint: The volume of a sphere is proportional to the cube of the radius.)

• A) 35 pc
• B) 167 pc
• C) 350 pc
• D) 20 kpc

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Definitions:

Post-Traumatic Growth

Positive psychological changes as a result of struggling with extremely challenging circumstances and life crises.

Psychological Changes

Alterations or developments in emotional, cognitive, or behavioral characteristics over time due to various factors or life experiences.

Life Crises

Significant life events that require a substantial amount of adjustment and can lead to personal growth or distress.

Biological Perspective

A way of looking at psychological issues by examining the biological bases of behavior, including genetics, brain structures, and biochemical processes.