All About The Universe. Essay

1670 words - 7 pages

YEAR 9 SETI ASSIGNMENTOBJECTS IN THE UNIVERSEi.Explain how stars can be classified according to size, colour and temperature.Astronomers use The Hertzsprung-Russell Diagram, which is a graphical tool to classify stars according to their luminosity, spectral type, color, temperature and evolutionary stage. In this diagram, the brightest stars lie near the top of the diagram and the hottest stars lie to the left. On the H-R diagram, most of the stars, including the Sun, fall along a diagonal line that goes from the upper left to the lower right of the diagram. This line is called the main sequence. The great majority of stars neighboring the Sun fall on the lower part of the H-R diagram's main sequence, and relatively few lie on the portion of the main sequence above the Sun. This means that most of the Sun's neighboring stars are both cooler and fainter (in absolute magnitude) than the Sun. A smaller population of brighter but cooler stars known as supergiants occupies the uppermost region of the diagram. Some stars, which are difficult to discover because they are so faint, lie near the bottom of the H-R diagram. These faint stars are called white dwarfs. Below is the Diagram of Main Sequence.ii.Explain what a galaxy is and describe, with examples, the four main types.A galaxy is a collection of billions of stars and matter held loosely together by gravity. They are often spread over thousands of light years. Astronomers estimate that there are about 125 billion galaxies in the universe. All the stars visible to the unaided eye from Earth belong to Earth's galaxy, the Milky Way. The Sun, with its associated planets, is just one star in this galaxy.There are four main types of galaxies:Spiral Galaxies: a galaxy consisting of an older central nucleus of stars from which extend two spiral arms of gas, dust, and newer stars. They are distinctive, not only because of their shape, but because the numbers of brighter, younger stars tend to be very high. The two arms of a spiral galaxy are often rich in star forming areas. They also contain a lot of interstellar material, visible as reddish discharge nebulae or darker dusty clouds. Some examples of Spiral Galaxies are the Whirlpool Galaxy, The Great Andromeda Spiral Galaxy and the Sombrero Galaxy.Lenticular Galaxies: The lenticular galaxies are disk galaxies without any obvious structure in their disks. This is probably because they have either used up most of their interstellar matter, so that they consist of old stars only, which have found a smooth and even allocation in the disk by the time, or because the galaxy has not closely encountered any neighbor in the past few hundred million (or few billion) years. From their appearance they look more like ellipticals rather than spirals, and have often been misclassified due to this fact. An example of a Lenticular Galaxy is the Spindle Galaxy in Sextans.Elliptical galaxies: - is the most abundant type of galaxy in the Universe. They tend to consist mostly...

Find Another Essay On All about the universe.

ALL ABOUT THE French singer-songwriter Renaud.

960 words - 4 pages Over the past twenty-five years, French singer-songwriter Renaud has emerged as his country's leading exponent of chanson sociale, a rich and diverse tradition of popular song which has helped to rally, educate and galvanise dispossessed groups in French society since the first half of the nineteenth century. Renaud became well-known in the second half of the 1970s by singing about zonards (delinquent youths) from the housing estates of suburban

all about the arts of usa

3326 words - 13 pages on all year. Explain that as they read the novel, they will further explore the idea of "taking a stand," which they have been discussing for the past week. Today they will look at a specific stand and determine what the reader learns about the character from his or her stand. Distribute the Chapter 2 (pages 19-22) Text-Dependent Questions Note-catcher. Tell students that they are now going to take time to reread a key scene from Chapter 2. See

Paley vs. Hume This is a inductive argument about the origin and nature of God, religion, and the universe.

1025 words - 4 pages orbits that do not crash into each other, the sun rises and sets each morning, and human beings exist on Earth. Looking at this proof from another perspective, one can conclude that nothing is ever brought about without a creator.A person couldn't toss all of the contents of a watch into the air and expect them to fall back to the ground as a watch. Nothing happens without clashing from some intelligence, and Paley states that the universe came

Considering All the Facts: Mistakes About Standardized Tests

2882 words - 12 pages Considering All the Facts: Mistakes About Standardized Tests There has been a lot of talk about standards for schools. Politicians have made this issue a campaign debate. Now everyone has jumped on the “bandwagon” and wants accountability of students’ education (Shafer, 2002). When there is a problem in the education system, teachers are the first to be blamed. They are left with the responsibility of proving they are teaching what needs

"All quiet on the western front" about World War I.

908 words - 4 pages "All quiet on the western front" is a very special movie, it emphasizes the brutality of the war and how people are changed by it. The main character is Paul, who is the leader of a group of 19-year-old former university students. As we watch the film we can clearly see how his attitude towards the war and beliefs about the war change from him being proud and enthusiastic to go to the front to him questioning the whole idea of war and just

The American Dream: It's Not All About Money

1227 words - 5 pages As individuals, we have our own ideas of what the American Dream consists of. To some it may be the realm of possibilities, while to others it may be fame and fortune. America is the only country in which the idea of a national dream has been continually upheld, and we have been a model for other nations to follow. Foreigners have come here to live the dream, and all the while Americans are still struggling to find it. As we continue to

Where the rivers flow by scott walker... all about.

719 words - 3 pages beliefs.As children grow they come into their own and can no longer blindly accept the tradition to which they have been born.The process of developing our own stance of faith over against the faith of tradition the integration of faith.We project our faith on to our children - on a personal note I hope that I will find and project the right things to my children. This book really made me think about that.Intuition - The feeling of something a

Write an essay which explains what you understand about the importance of Imaginative Journeys as a means of gaining knowledge of self and our place in the universe.

1247 words - 5 pages Imaginative journeys are a great importance to one's life as it is a key that holds the experience to gain knowledge of self and one's place in the universe. There are several texts which explore this concept, such as "Frost at Midnight" and "Kubla Khan" written by Samuel Coleridge as well as Victor Kelleher's book cover of his novel "The Ivory Trail". All of these texts illustrate the immense power of a human's imagination through the creation

Its all about demi moore.Its a biographie on her which adds all her movies, were she was born. All the details you want you will have them here.

597 words - 2 pages "General Hospital." Then, at age 18, she married rock musician Freddy Rocker, divorcing him four years later.Moore's early films included the horror flick Parasite (1981), Young Doctors in Love (1982) and No Small Affair (1982). But it was the post-college angst drama St. Elmo's Fire that put the actress in the big league. The film's ensemble cast included Emilio Estevez, Rob Lowe, Ally Sheedy, Andrew McCarthy and Judd Nelson, all of whom became

The Damaging effects of war: About the war novel "All Quiet on the Western Front".

820 words - 3 pages because he doesn't know how to feel anymore. Even after he leaves the war, he still cannot forget about the horrors. For instance, while he is at home and hears the screaming of the tramcars, he mistakes them for a screaming bombshell coming at him. Paul cannot feel anything but can see all sadness, and his psychological damage is clearly a permanent problem.The necessary detachment of feeling the soldiers must go through also causes damage to the

AIDS In the World: This essay is about AIDS. How AIDS effect, the prevention, and all about AIDS.

760 words - 3 pages of 2003, an estimated 40 million people worldwide - 37 million adults and 2.5 million children younger than 15 years - were living with HIV/AIDS. Nowhere is this better demonstrated than in sub-Saharan Africa, where the number of AIDS cases far exceeds that of all other geographic regions. Of the estimated 14,000 HIV infections that occur each day worldwide, about half of these infections occur in sub-Saharan Africa. About 70 percent of all

Similar Essays

Science Will Never Reveal All The Secrets In The Universe

592 words - 2 pages older times and now. The change in perception has also caused these Areas of Knowledge to change and progress. The perception of the future generations may be different from the current generation, which may cause these areas to change again. This process will go on for ever and these areas will keep progressing and growing just like natural sciences. If science is growing day by day, one may say that one day all the facts of the universe will be

This Essay Is About A Magical Eraser. Great For A Philisophical Essay, Or If You Have One Of "Thoes Teachers" That Are Contemplating The Universe All The Time.

692 words - 3 pages rubber molecules themselves when in contact with UV rays. As we came to know it, everything does revolve around our sun, or at least our science does. As for the center of the universe, there is none. Very simple, the universe is not expanding, and has no limits. So as you can see, these Erasers have became very valuable, seeing as how our sun has died, the only star that we know of, capable of producing the exact right wavelengths of light to

All About The Acl Essay

1575 words - 6 pages can be torn in other instances such as during rough play, vehicular collisions, falls, and work –related injuries. According to a study performed by Jonathan Cluett, M.D., about 80% of sports-related ACL tears are “non-contact” injuries. This means that the injury does not result from any contact with another athlete. A rupture to the ACL is the result of the ligament within the knee being overstretched. This is usually caused by a “plant-pivot

All About The Religion "Wicca" Essay

1427 words - 6 pages the human mind and heart conceived-the Great Mother Goddess and her consort the Horned God" (Crowley 88). The Divine is the life force, the power that moves the Universe. The Goddess is worshipped in her ancient names: Aradia, Cerridwen, Isis, Astarte, Dione, Aphrodite, Dana, and Arianrhod. She is called all these different names because these are the names she was given through out the years. The Wiccan Goddess is worshipped in Triple form. "As