What are streams and shells in galactic halos, and how do they form? How do accreted dwarf galaxies contribute to the halo stellar population and its orbits?
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- What are radial velocity measurements used for in studying stellar orbits?
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- What is the habitable zone of a star, and how do stellar orbits influence whether a planet stays within it? How do stellar orbits in binary systems affect the habitability of planets around one or both stars?
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- How do stellar orbits constrain the distribution of mass in the Milky Way's disk? How do stellar orbits probe the dark matter halo of the Milky Way?
- How do the dynamics and stellar orbits in dwarf irregular galaxies differ from those in dwarf spheroidal galaxies? What are the orbits of stars in interacting dwarf galaxy pairs?
- What is evaporation in star clusters? How do stellar orbits in globular clusters provide evidence for dark matter?
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