If We Say That a Galaxy Has a Lookback Time

question 138

Multiple Choice

If we say that a galaxy has a lookback time of 1 billion years, we mean that ________.

• A) its light traveled through space for 1 billion years to reach us
• B) it is now 1 billion light-years away
• C) it was 1 billion light-years away when the light left the galaxy
• D) it is 400 million years old

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Definitions:

Review Interval

The scheduled period or frequency at which performance reviews or evaluations occur within an organization, which can vary from monthly to annually.

Human Resources Audit

A comprehensive evaluation of all policies, systems, and procedures in the human resources department to identify areas of improvement and ensure compliance with laws and best practices.

Legally Defensible

Actions or decisions that can be supported or justified in a court of law.

Objective Data

Information that is factual and quantifiable, not influenced by emotions, opinions, or personal bias.