Galaxies

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Galaxies By: Beth Hrabik

Profiencey # 1: I can analyze galaxies and the differences between galaxies. I will compare the Milky Way Galaxy to other types of galaxies.

What Are Some Types of Galaxies? ,[object Object],[object Object],[object Object]

Type of Galaxies Spiral Galaxy Elliptical Galaxy Irregular Galaxy

Milky Way ,[object Object],[object Object],[object Object],[object Object],[object Object]

Irregular Galaxy ,[object Object],[object Object],[object Object]

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Sp10Name: ________________________________ Lab Report for Lab #9:Where in the Milky Way Are We? Part I: The shape of the Milky Way 1. Look up the morphological classification of the Milky Way. There is a bit more to it than “spiral”. Look for information on morphological classification in text books and/or online. Find out the shape of the Milky Way galaxy. [Type answer here] 2. Identify the parts the Milky Way. Some possible parts of a galaxy are: bulge, disk, halo, bar, or arm. Knowing the type of galaxy the Milky Way is, you should be able to identify the types of features the Milky Way has. Create a physical model of the Milky Way and identify the features it has. (A globe is an example of a physical model of Earth.) Describe your model and label all possible parts. [Type answer here] 3. Use your planetarium software to observe the Milky Way from the northern and southern hemispheres. Based on your observations (without the aid of telescopes or other wavelengths of light outside the visible range) explain how these observations support the conclusion that we live in a galaxy with the shape of your model. Further, determine in what part of the galaxy the Sun must be located to see the Milky Way as we do. [Type answers here] Part II: Mapping the Milky Way with Globular Clusters Galaxies like the Milky Way have objects, called “globular clusters” that exist in the outer regions of the galaxy (or halo). Globular clusters are dense clusters of stars that are generally free of gas and dust. In galaxies like the Milky Way, the gas and dust are located primarily in the disk. If we want to look for objects that we can see clearly (with no interference from gas and dust) we must observe objects in the halo. In the late 19th century an astronomer named Harlow Shapley devised an experiment to determine the position of Earth in the universe using globular clusters. He chose these objects because of their apparent lack of interaction with the gas and dust in the Milky Way. Step 4.Explain how Shapley’s experiment could be used to determine the position of Earth within the Milky Way. Given what you already know about the part of the galaxy in which the Sun is located and the information about globular clusters, what information would Shapley need to figure out the position of Earth? For about how many globular clusters do you think he would need to get this information to determine the position of Earth? Describe the experiment and list the steps one would need to take. [Type answers here] Step 5. As a group, devise a method for determining the position of Earth within the Milky Way using globular clusters. Decide how many globular clusters you want to observe. Decide what information you need to do the analysis. There may be many different ways of analyzing the data, there does not need to be group consensus for the analysis, but each method that is used should be discussed with the group. [Type answers here] 6. Gather the data you need from .

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In this guide, we explore the fascinating world of galaxies, those vast cosmic structures made up of billions of stars. We provide a deeper understanding of the different types of galaxies and the processes that shape their existence. The journey begins with an introduction, setting the stage for our exploration. We then dive into the colossal islands of stars, discovering the mind-boggling scale of these galactic entities. From there, we delve into the intricate details of billions of stars, uncovering the magnitude and diversity within these cosmic neighborhoods. We focus on spiral galaxies, investigating their graceful arms and mesmerizing beauty. We learn about their distinct features, such as the central bulge and spiral arms, and explore the different subtypes. In contrast, we encounter elliptical galaxies, with their smooth and elongated shapes. We explore their origins and the processes that lead to their formation. We also explore irregular galaxies, with their irregular shapes and diverse compositions. We examine their origins and the forces that contribute to their chaotic nature. Supermassive black holes, lurking at the hearts of galaxies, are an essential part of the discussion. We delve into their formation, growth, and influence on galactic evolution. As we progress further, we unravel the cosmic evolution of galaxies and explore the mechanisms that drive their formation and transformation over time. Galaxy classification takes center stage as we examine different systems used by astronomers. We explore the Hubble sequence and its significance in understanding the diverse array of galactic structures. We delve deeper into the classification of spiral galaxies, exploring their subtypes like barred spirals and their unique features. Elliptical galaxies also receive a closer look as we investigate their classification system and the factors contributing to their diverse range of shapes and sizes. We witness cosmic collisions between galaxies and explore the remarkable transformations that occur as a result, providing insights into galactic evolution. Active galactic nuclei offer a glimpse into some of the most energetic phenomena in the universe. We examine the powerful forces at play within these galactic powerhouses and explore the supermassive black holes at their cores. In conclusion, this comprehensive guide aims to provide a deeper understanding of galaxies, those awe-inspiring structures that have captivated humanity for centuries. Whether you are an amateur stargazer or a seasoned astronomer, we hope this resource will ignite your curiosity and inspire you to continue exploring the wonders of our vast universe. Download our free PDF now and embark on a journey through the cosmos: https://theuniverseepisodes.com/what-is-galaxy-pdf-free-download/

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1. Galaxies By: Beth Hrabik

2. Profiencey # 1: I can analyze galaxies and the differences between galaxies. I will compare the Milky Way Galaxy to other types of galaxies.

3.

4. Type of Galaxies Spiral Galaxy Elliptical Galaxy Irregular Galaxy

5.

6.

7.