1. Why do metal-poor stars have a wider range of orbital shapes than metal-rich stars like the…

1. Why do metal-poor stars have a wider range of orbital shapes than metal-rich stars like the sun? 2. What evidence contradicts the monolithic collapse hypothesis for the origin of our galaxy? 3. How Do We Know? Calibration simplifies complex measurements, but how does that make the work of later astronomers dependent on the expertise of the astronomer who did the calibration?  

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