AL Galaxies

docx

School

El Paso Community College *

*We aren’t endorsed by this school

Course

1303

Subject

Electrical Engineering

Date

Jan 9, 2024

Type

docx

Pages

Uploaded by PresidentSteelMule26

Alcala 1 Denisse Alcala John Olgin ASTR 1303 11/02/2023 Galaxy Rotation 1. Describe what has been discovered based on observations on how galaxies rotate. Based on your research, is this what scientists expected to happen? Observations of how galaxies rotate have led to a number of important discov- eries such as that all galaxies rotate, the rotation of galaxies is not uniform, and the rotation of galaxies is faster than can be explained by the visible matter in the galax- ies. Scientists did not expect to find that galaxies rotate the way they do. In particular, the fast rotation of the outer regions of galaxies was a surprise. This is because the visible matter in galaxies is not concentrated enough in the outer regions to produce the necessary gravitational force. 2. Collisions: Based on your research, what is expected to occur when our Milky Way collides with Andromeda. Is there a good chance for stars of these galaxies to collide with one another? Explain briefly, using your own sketches to help illustrate your re- sponse. The collision of the Milky Way and Andromeda will be a truly awe-inspiring event, the two galaxies will begin to interact in about 4 billion years, and the merger will be complete in about 6 billion years. While the stars in each galaxy are unlikely to collide directly, the gravitational interactions will cause them to be flung into new orbits and cause effects such as galactic cannibalism and tidal disruptions. In the end, the Milky Way and Andromeda will merge to form a new, larger elliptical galaxy.

Alcala 2 3. Galaxy Super Clusters: Explain the nature of these structures and sketch out what you learned from the Nature video regarding the structures of these massive collection of galaxies. Galaxy superclusters are made up of hundreds or even thousands of galaxies, bound together by gravity. They are thought to have formed early in the history of the universe when it was much denser than today. The nature video “Laniakea: Our home supercluster”, discusses a number of interesting aspects of galaxy superclusters that tell us how they’re not evenly distributed throughout the universe, are constantly moving, and may contain hidden structures. Overall, this video provides a good over- view of what we know about these massive collections of galaxies.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version