Answered: The orbit of stars in elliptical…

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

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Transcribed Image Text:### Understanding the Orbits of Stars in Elliptical Galaxies Elliptical galaxies are a type of galaxy characterized by their ellipsoidal shape and smooth, nearly featureless brightness profile. Understanding the behavior and orientation of stars within these galaxies is crucial for comprehending galaxy dynamics and evolution. **Question: The orbit of stars in elliptical galaxies** 1. ⃝ **have random orientations:** - In elliptical galaxies, the orbits of stars do not follow a single, uniform pattern. Instead, they exhibit various directions and inclinations, contributing to the overall shape and appearance of the galaxy. 2. ⃝ **are all in the same direction:** - This is not typical for elliptical galaxies. Unlike spiral galaxies, where stars tend to orbit in a well-defined plane and direction, stars in elliptical galaxies have a more dispersed orientation. 3. ⃝ **have many different objects at the focus:** - While elliptical galaxies can contain numerous stars, black holes, and interstellar matter, individual star orbits focus on a center of mass rather than multiple distinct objects. 4. ⃝ **are all circular:** - The orbits within elliptical galaxies are generally not all circular. They can be quite varied, often elliptical and highly eccentric, contributing to the galaxy's overall shape. Understanding these properties allows astronomers to infer the formation and evolutionary processes of elliptical galaxies and their differences compared to other galaxy types.

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