What are stable and unstable orbits? What are some open questions about stellar orbits?
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- What is the N-body problem in celestial mechanics? How can we use stellar orbits to learn about the formation of star systems?
- How do density waves in spiral arms affect stellar orbits? What is the concept of epicyclic motion for stars in galactic disks?
- What are the different models for the distribution of dark matter in galaxies? How do stellar orbits in the outer halo constrain the Milky Way's mass?
- What are the tidal disruption events of globular clusters, and how do they affect stellar orbits in the halo? What are the orbits of dwarf galaxies orbiting the Milky Way?
- What are the orbits of stars in the galactic thin disk and how do they relate to the Milky Way's ongoing star formation? How do chemical abundances of stars correlate with their orbital properties in the Milky Way?
- How do the properties of dark matter halos in low surface brightness galaxies compare to those in brighter galaxies? What are the orbits of stars in galaxies undergoing active star formation at high redshift?
- What are tidal forces, and how do they influence stellar orbits? What is orbital resonance?
- How does Doppler spectroscopy reveal information about stellar orbits?
- How does feedback from supermassive black holes influence the distribution and kinematics of stars in their host galaxies? What are the orbits of stars in galaxies with extreme star formation rates (starbursts and blue compact dwarfs)?
- What are warpings and flares in galactic disks, and how do they affect orbits? What are the orbits of stars in galactic halos?
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