question archive To the greatest possible extent, answers should be in your own words and should demonstrate an understanding of the concepts involved
To the greatest possible extent, answers should be in your own words and should demonstrate an understanding of the concepts involved
Subject:BiologyPrice: Bought3
To the greatest possible extent, answers should be in your own words and should demonstrate an understanding of the concepts involved. (More than just a glossary definition of the terminology is expected).
Questions:
1. How is the 21-cm line of radiation generated by hydrogen atoms? What can we learn about the Galaxy from observations of 21-cm radiation?
2. Why do we not observe O and B stars in globular clusters?
3. What observations led Harlow Shapley to conclude that we are not at the center of the Galaxy?
4. Briefly describe how the theory of self-propagating star formation accounts for the existence of spiral arms in some spiral galaxies.
5. What is a standard candle, and why is it important to measuring the Hubble constant?
