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An astronomer measures the rotation speed of a spiral galaxy.How can she use this to estimate the galaxy's distance?
Snacks
Small portions of food generally eaten between regular meals, often to alleviate hunger or provide energy.
Nutritional Assessment
The analysis of various health factors to determine a person's nutritional status and dietary needs.
Overweight
A condition characterized by having more body weight than is considered normal or healthy for a certain height, often due to excess body fat.
Fat
A natural oily substance occurring in animal bodies, especially when deposited as a layer under the skin or around certain organs.
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