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Explorations: Stars, Galaxies, and Planets
Thomas Arny, University of Massachusetts
Galaxies

Essay Questions



1

Hubble proposed that his tuning-fork diagram might represent evolutionary changes with E galaxies gradually changing to S galaxies. What evidence based on the amount of interstellar matter and kind of stars in E and S galaxies indicates that this is very unlikely?
2

If you wanted to look at yourself as a baby, how far out in space would you need to be? (Assume you have a sufficiently powerful telescope and that you can travel instantly to any distance.) How does this relate to astronomers studying young galaxies?








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