Galaxies

Galaxies are majestic celestial structures that captivate our imaginations and offer glimpses into the vastness of the universe. They are the building blocks of the cosmos, each housing billions or even trillions of stars along with countless other celestial objects. Let us delve deeper into the three main types of galaxies: spiral, elliptical, and irregular.

Spiral Galaxy:

Among the diverse galaxies, spiral galaxies reign as the most common type, comprising over 75% of all known universes. They possess a captivating beauty with their graceful, swirling arms and pronounced core. The spiral arms of these galaxies exhibit a high rate of star formation, with hot, young stars illuminating their surroundings. These galaxies are also relatively young, containing copious amounts of gas and dust, serving as new stars’ birthplaces.

PHY 1000 Unit 8 Zoo of Galaxies

What distinguishes spiral galaxies is their vibrant colors, which reflect the different stages of star development within them. In the tapestry of a spiral galaxy, red hues mark the presence of older stars nearing the end of their lives, while blue regions signify the birth of young, energetic stars. This color variation is akin to excavating Earth’s soil, where the deeper one digs, the more prosperous and diverse the layers become due to the accumulation of minerals over time.

Spiral galaxies exhibit a range of forms. Some appear as tightly wound spirals, where discerning the individual arms can be challenging. Others showcase a more moderate winding, gradually revealing their distinct components. Lastly, loosely wound spirals proudly unveil their outstretched arms emanating from the central bulge. Notably, our heavenly abode, the Milky Way galaxy, shares many similarities with a typical spiral galaxy.

Elliptical Galaxy:

In contrast to the mesmerizing spirals, elliptical galaxies exude a different aura of grandeur. These galaxies are the largest entities in the universe, boasting masses exceeding 10 billion solar masses. Unlike their spiral counterparts, elliptical galaxies lack intricate arms and graceful swirls. Instead, they adopt a rounded or elongated shape reminiscent of a bulge.

PHY 1000 Unit 8 Zoo of Galaxies

Elliptical galaxies present a stark contrast in terms of star formation and composition. They consist of minimal amounts, if any, of gas and dust. Consequently, they display no discernible signs of young star creation. Instead, the stars within these galaxies are predominantly aging, nearing the twilight of their existence. 

The color palette of elliptical galaxies tends to lean towards red, owing to the prevalence of low-mass, older stars. The lack of gas and interstellar dust required for new star formation indicates that these galaxies have depleted their fuel and are gradually waning.

Irregular Galaxy:

Nature always holds a few surprises, and irregular galaxies embody that sense of wonderment. These galaxies defy the structured elegance of spirals and the rounded contours of ellipticals. Irregular galaxies are characterized by their peculiar, asymmetrical shapes and chaotic appearance. Their distorted forms can range from a mishmash of twisted arms to a cigar-shaped structure with a cloud-like formation at one end, reminiscent of smoke drifting away.

Irregular galaxies represent the outliers, accounting for less than 5% of all known galaxies. They are often the smallest and least luminous members of the galactic family. However, what sets them apart is their inherent youthfulness. Irregular galaxies harbor the newest generation of stars, with environments rich in interstellar dust and gases. These cosmic nurseries are the birthplaces of countless young stars, painting the galaxy with a vibrant blue hue.

PHY 1000 Unit 8 Zoo of Galaxies

Within the realm of irregular galaxies, two primary classifications emerge. Irr I galaxies consist predominantly of blue stars, indicating their youthful nature. These galaxies are brimming with stellar activity as new stars burst into existence.

 On the other hand, Irr II galaxies exhibit peculiar characteristics resulting from recent explosive events or close encounters with neighboring stars or galaxies. Among these rare curiosities, a notable example is the Starburst galaxy, known for its intensely bright and active core. The star clusters within this galaxy outshine anything found within our own Milky Way, radiating brilliantly across the entire spectrum of colors.

Our Universe:

Contemplating the universe’s grand tapestry and its evolution is an awe-inspiring journey. As we unravel the mysteries of the cosmos, we encounter an ever-changing landscape of cosmic wonders. 

Our understanding of the universe has evolved from ancient stargazers who marveled at the brightness in the night sky to the sophisticated telescopes in space, enabling us to peer deep into the cosmic abyss. Unmanned satellites embark on audacious missions, pushing the boundaries of exploration with hopes of reaching the edge of our galaxy and venturing even further into the unknown.

PHY 1000 Unit 8 Zoo of Galaxies

Just as ancient civilizations discovered that the Earth is not flat and that we are not the center of the universe, our pursuit of knowledge continues unabated. We persistently strive to comprehend the intricate workings of the universe by observing, analyzing, and theorizing. 

Billions of years have culminated in our present understanding. With ever-advancing scientific achievements, we anticipate that Earth will endure for billions more, providing ample time for us to unravel other cosmic secrets and expand our intellectual horizons.

The galaxies’ diverse forms and mesmerizing features serve as beacons of inspiration and remind us of the infinite possibilities that await discovery. They beckon us to gaze skyward, ponder our place in the vast cosmos expanse, and embark on an unending quest for knowledge and understanding.

References 

Airapetian, V. S. (2014). Rocking stories of the universe. Dubuque, IA: Great River Learning

ADDITIONAL INSTRUCTIONS FOR THE CLASS

SCORE A+ WITH HELP FROM OUR PROFESSIONAL WRITERS – PHY 1000 Unit 8 Zoo of Galaxies

We will process your orders through multiple stages and checks to ensure that what we are delivering to you, in the end, is something that is precise as you envisioned it. All of our essay writing service products are 100% original, ensuring that there is no plagiarism in them. The sources are well-researched and cited so it is interesting. Our goal is to help as many students as possible with their assignments, i.e. our prices are affordable and services premium.

• Discussion Questions (DQ)

Initial responses to the DQ should address all components of the questions asked, including a minimum of one scholarly source, and be at least 250 words. Successful responses are substantive (i.e., add something new to the discussion, engage others in the discussion, well-developed idea) and include at least one scholarly source. One or two-sentence responses, simple statements of agreement or “good post,” and responses that are off-topic will not count as substantive. Substantive responses should be at least 150 words. I encourage you to incorporate the readings from the week (as applicable) into your responses.

• Weekly Participation

Your initial responses to the mandatory DQ do not count toward participation and are graded separately. In addition to the DQ responses, you must post at least one reply to peers (or me) on three separate days, for a total of three replies. Participation posts do not require a scholarly source/citation (unless you cite someone else’s work). Part of your weekly participation includes viewing the weekly announcement and attesting to watching it in the comments. These announcements are made to ensure you understand everything that is due during the week.

• APA Format and Writing Quality

Familiarize yourself with the APA format and practice using it correctly. It is used for most writing assignments for your degree. Visit the Writing Center in the Student Success Center, under the Resources tab in Loud-cloud for APA paper templates, citation examples, tips, etc. Points will be deducted for poor use of APA format or absence of APA format (if required). Cite all sources of information! When in doubt, cite the source. Paraphrasing also requires a citation. I highly recommend using the APA Publication Manual, 6th edition.

• Use of Direct Quotes

I discourage over-utilization of direct quotes in DQs and assignments at the Master’s level and deduct points accordingly. As Masters’ level students, it is important that you be able to critically analyze and interpret information from journal articles and other resources. Simply restating someone else’s words does not demonstrate an understanding of the content or critical analysis of the content. It is best to paraphrase content and cite your source.

• LopesWrite Policy

For assignments that need to be submitted to Lopes Write, please be sure you have received your report and Similarity Index (SI) percentage BEFORE you do a “final submit” to me. Once you have received your report, please review it. This report will show you grammatical, punctuation, and spelling errors that can easily be fixed. Take the extra few minutes to review instead of getting counted off for these mistakes. Review your similarities. Did you forget to cite something? Did you not paraphrase well enough? Is your paper made up of someone else’s thoughts more than your own? Visit the Writing Center in the Student Success Center, under the Resources tab in Loud-cloud for tips on improving your paper and SI score.

• Late Policy

The university’s policy on late assignments is a 10% penalty PER DAY LATE. This also applies to late DQ replies. Please communicate with me if you anticipate having to submit an assignment late. I am happy to be flexible, with advance notice. We may be able to work out an extension based on extenuating circumstances. If you do not communicate with me before submitting an assignment late, the GCU late policy will be in effect. I do not accept assignments that are two or more weeks late unless we have worked out an extension. As per policy, no assignments are accepted after the last day of class. Any assignment submitted after midnight on the last day of class will not be accepted for grading.

• Communication

Communication is so very important. There are multiple ways to communicate with me: Questions to Instructor Forum: This is a great place to ask course content or assignment questions. If you have a question, there is a good chance one of your peers does as well. This is a public forum for the class. Individual Forum: This is a private forum to ask me questions or send me messages. This will be checked at least once every 24 hours.

• Guarantee

• Zero Plagiarism
• On-time delivery
• A-Grade Papers
• Free Revision
• 24/7 Support
• 100% Confidentiality
• Professional Writers

• Services Offered

• Custom paper writing
• Question and answers
• Essay paper writing
• Editing and proofreading
• Plagiarism removal services
• Multiple answer questions

We will process your orders through multiple stages and checks to ensure that what we are delivering to you, in the end, is something that is precise as you envisioned it. All of our essay writing service products are 100% original, ensuring that there is no plagiarism in them. The sources are well-researched and cited so it is interesting. Our goal is to help as many students as possible with their assignments, i.e. our prices are affordable and services premium.

Looking for a Similar Assignment? Order a custom-written, affordable, plagiarism-free paper