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Who first used RR Lyrae variable stars to determine distances in our Milky Way galaxy
Limitations
Boundaries or restrictions that define the scope, extent, or application of something, acknowledging its constraints or shortcomings.
Money Constraints
Financial limitations or restrictions that impact one's ability to spend, invest, or allocate funds.
Company Policy
Guidelines and rules set by a company to dictate behavior and procedures within the organization.
Passive Verb
A form of verb that indicates the subject of the sentence is the recipient of the action rather than the doer.
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