In the figure shown below, the upper spectrum is from hydrogen at rest in a laboratory, and the lower spectrum is from a galaxy.How far away is this galaxy? 
Definitions:
Personal Expression
The process of conveying one's thoughts, feelings, or ideas through various forms of communication or artistic mediums.
Commercial Products
Goods and services that are produced and marketed for profit, catering to consumer needs and preferences.
Rationalization
is the process of replacing traditional and emotional thought with reason and practicality, often in organizational and societal contexts.
Time Crunch
The feeling of having insufficient time to accomplish one's tasks or enjoy leisure activities.
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