What is the concept of a gravitational potential well? How do stars orbit the center of a galaxy?
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- What are the orbits of stars around supermassive black holes? What are S-stars orbiting Sagittarius A*?
- How do the properties of dwarf spheroidal galaxies and their stellar orbits compare across different host galaxy potentials? What are the orbits of stars in dwarf irregular galaxies?
- 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?
- How do close encounters with other stars affect an orbit? What are rogue planets, and how are their orbits different from stars?
- How does dynamical friction affect stellar orbits? How can we use stellar orbits to measure distances to stars?
- What are stellar mergers, and how do they result from orbital evolution? How can stellar orbits be used to detect black holes?
- How can we simplify the two-body problem? What is dark matter, and how might it affect stellar orbits?
- What are the orbits of metal-poor stars in the Milky Way? What are the orbits of thick disk stars compared to thin disk stars?
- How do the stellar orbits in galaxy clusters reveal information about the cluster's mass distribution and dynamics? What is the virial theorem, and how does it relate to the velocities and orbits of stars in galaxy clusters?
- How do stellar streams and tidal tails help us map the distribution of dark matter in galactic halos? What are the orbits of stars that have been tidally stripped from dwarf galaxies or globular clusters?
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