Stars, galaxies, and the universe chapter outline 1. While most of the universe doesnt become reionized until 550 million years afterwards, a few fortunate. Many of these galaxies are near the limit of the observable universe, which is. Use our video lessons and quizzes to help you understand theories of how the universe formed. You will also be introduced to astronomical observing, and the practice of science. We must assume that the universe is homogeneous and isotropic on even larger scales, so that forces from galaxies outside our survey volume will average to zero. But since 1992 a large number of facts have been collected and cosmology is becoming. Chapter 20 galaxies how are the lives of galaxies connected with. Universe, galaxies and stars astronomy and space news. Pdf galaxies in the universe download full pdf book. Solar system, stars, and galaxies kindle edition by seeds, michael a. Our universe has trillions of galaxies about 100 million or 10 to the eighth power stars inhabit the average galaxy, according to one of the best estimates, conselice wrote in an email. The 5th edition has been updated with new material and new discoveries.
Astronomy 275 lecture notes, spring 2015 c edward l. The universe is often called space, and is sometimes known as the cosmos. Windows to the universe has a classroom friendly explanation of. This puzzle contains words that are commonly found in a chapter on thestars, galaxies and the universe. The milky way galaxies and the milky way 3 structure of the milky way years from the galactic center on the edge of one of the spiral arms. Moons, planets, solar system, stars, galaxies, in our universe cdn. Some are called dwarf galaxies, containing ten million or so stars, 500 times smaller than our own galaxy. Galaxies range in size from dwarfs with just a few hundred million 10 8 stars to giants with one hundred trillion 10 14 stars, each orbiting its galaxys center of mass. Feb 24, 2010 the stars and the galaxies in the universe 2 l 1. Stars, galaxies, and the universe section 1 characteristics. Stars, galaxies, and the universe section 2 stellar evolution. Top 5 most beautiful and well known galaxies in the universe duration. Our universe has trillions of galaxies about 100 million or 10 to the eighth power stars inhabit the average galaxy, according to one of the best estimates, conselice wrote in.
This course examines the greater universe beyond the solar system, the plausibility of interstellar travel, and the search for extraterrestrial intelligence. Many galaxies are thought to have supermassive black holes at their centers. Oct 20, 2016 top 5 most beautiful and well known galaxies in the universe duration. Topics include the gravitational growth of structure, the intergalactic medium, the formation and evolution of the first stars and black holes, feedback and galaxy evolution, reionization, 21cm cosmology, and more. An international team of astronomers, led by christopher conselice, professor of astrophysics at the university of nottingham, have found that the universe contains at least 2.
High school earth sciencestars, galaxies, and the universe. Stars, galaxies, and the universe 2020 spring semester 1 overview purpose welcome. Iv galaxies and cosmology 22 our galaxy 23 galaxies 24 quasars and active galaxies 25 cosmology. Not 10 times the stars or mass, those numbers have stayed the. It was proposed that since the big bang was an explosion in all directions, then the universe should be expanding. Nov 01, 2018 high school earth sciencestars, galaxies, and the universe. Despite this enormous range, most galaxies form into similar. May 26, 2016 the universe, the stars and the galaxies look at space, look at the universe have you ever asked yourselves exactly what stars are. Hubbles latest breakthrough reveals trillions of unknown. The first galaxies in the universe starts from basic physical principles before moving on to more advanced material. Winner of the american astronomical societys 2008 chambliss astronomy writing award everything you might have wanted to know about galaxies, but had the good sense not to. Ken freeman, duffield professor, the australian national university the scope of the book is impressive indeed. Ken freeman, duffield professor, the australian national university the. Some are unimaginably big, 20 times bigger than our galaxy and containing literally trillions of stars.
What is the star formation history of the universe. Nov 01, 2016 it turns out the universe has 10 times more galaxies than previously estimated 2 trillion galaxies. There are at least 2 trillion galaxies in the observable universe. Abell 370 contains a mere several hundred galaxies, which means there are still plenty out there for hubble to catch. Stars, galaxies, and the universe the whirlpool galaxy, also known as m51, is a spiral galaxy about 23 million lightyears from earth. The stars are huge gas spheres that shine in the darkness of. It turns out the universe has 10 times more galaxies than previously estimated 2 trillion galaxies. Stars, galaxies, and the universe the expanding universe. How are the lives of galaxies connected with the history of the universe. The milky way galaxy is a vast pinwheel of stars and gas turning within. In this activity, you will apply concepts of scale to grasp the distances between stars and galaxies.
Week 12 mapping the milky way galaxy or spiral arms and star formation. These galaxies are known as a b c d irregular galaxies elliptical galaxies spiral galaxies quasars astronomers believe that quasars are a dying galaxies b solar systems that are beginning to form c galaxies that are beginning to form. Stars, galaxies and the universe newpathworksheets. Several skills will be used in solving this puzzle, including spelling, vocabulary, reasoning, and word attack skills. Download it once and read it on your kindle device, pc, phones or tablets. Despite this enormous range, most galaxies form into similar patterns so you can catorgorise galaxies fairly easily. This galaxy and the milky way are believed to have merged in 3 billion years. Use a calculator to determine the scaled distance to. Its interactions with the yellowish dwarf galaxy ngc 5195 are of interest to astronomers because the galaxies are near enough to earth to be wellstudied.
Our sun is but one star out of more than 200 billion stars in the. The local group is part of the virgo supercluster, which contains hundreds of galaxies. Connecting the physics of stars, galaxies and the universe. Stars, galaxies, and the universe crossword by publicuniverse. Galaxies range in diameter from a few thousand to a few hundred thousand lightyears.
Oct 14, 2016 especially of interest is this surprising fact. The observable universe is a spherical region of the universe comprising all matter that can be observed from earth or its spacebased telescopes and exploratory probes at the present time, because electromagnetic radiation from these objects has had time to reach the solar system and earth since the beginning of the cosmological expansion. May 12, 2017 abell 370 contains a mere several hundred galaxies, which means there are still plenty out there for hubble to catch. The contents of the universe have probably changed as the universe grows older. The galaxies are receding from each other as expected in a uniform expansion. They have dynamic internal histories as well, with very different formation and evolution schemes under discussion and test. This is an abbreviated volume of universe, focusing on stars and galaxies.
A hubble census of galaxies showed that a black holes mass is dependent on the mass of its host galaxys central bulge of stars. Universe galaxies and stars is a website designed to help people think about all space and cosmos related issues, from the big bang theory to the end of time. Learn about neutron stars, black holes, supernovas, and more. Galaxies and the expanding universe worksheet answers. Universe stars and galaxies 5th edition rent 97814645279. You will use this understanding to elaborate on the question, do galaxies collide. Sep 29, 2017 before stars or galaxies formed, the universe was full of lightblocking, neutral atoms. Galaxies are in one sense the visible atoms of the cosmic fabric, tracing huge structures both in time and space. Galaxies are the places where gas turns into luminous stars, powered by nuclear reactions that also. First, we determine the average peculiar motion v x of our galaxies. Why cant the galaxy used in the above image be a real picture of the milky way. Milky way probably existed as several distinct galaxies which fell. The universe, the stars and the galaxies look at space, look at the universe have you ever asked yourselves exactly what stars are.
Recognize and describe that the sun is a mediumsized star located near the edge of a disk shaped galaxy of stars and that the universe contains many billions of galaxies and each galaxy contains. Peter scheuer in 1963 as reported by malcolm longair 1993, qjras, 34, 157. Its interactions with the yellowish dwarf galaxy ngc 5195 are of interest to astronomers because the galaxies are near enough to earth to be. The next table shows some of the brightest stars with their diameters and distances from the sun. The milky way is on a collision course with the nearby andromeda galaxy, and both will merge in. Stars, galaxies, and the universe flashcards quizlet.
There is little gas in these galaxies so new stars are not forming. Way before working out towards nearby galaxies and the distant universe, where galaxies can be seen in. It is believed the universe was created by the big bang theory. That is, the observable universe has a spherical volume a ball centered on the observer. In fact, the universe is now believed to be dominated by dark matter of an unknown nature everywhere except in the inner parts of bright galaxies, and the visible galaxies are thought to be just concentrations of ordinary matter located at the centers of much more massive and extended dark halos tremaine 1992.
And this is an image of the galaxies in the hubble deep field some of these galaxies are as far away as our best telescopes can see over 12 billion light years away. Stars, galaxies, and the universe notes linkedin slideshare. The characteristics of galaxies, how galaxies get their names, the components of a galaxy, identifying galaxies, dark matter possibilities. The various universe books place the basics of astronomy and the process of science within the grasp of introductory students.
Moons, planets, solar system, stars, galaxies, in our universe an introduction by rick kang educationpublic outreach coord. Use features like bookmarks, note taking and highlighting while reading universe. Stars, galaxies, and the universe star systems and galaxies. Any errors present in the final product must have crept in during the production. How many stars of each type it contains a galaxy with only massive.
The findings of the doppler effect, most notably the abundance of galaxies showing a red shift, supports this finding. The expanding universe this section explains how astronomers think the universe and the solar system formed. The initial explosion that resulted in the formation and expansion of the. The milky way is on a collision course with the nearby andromeda galaxy, and both will merge in about 4 billion. The milky way is a part of a cluster of 50 or so galaxies called the local group.
Winner of the american astronomical societys 2008 chambliss astronomy writing award everything you might have wanted to know about galaxies, but had the good sense not to ask. Astro 2 stars, galaxies, and the universe spring 2019. Galaxies and activity at their nuclei are now appearing to be inextricably linked. Space science our sun is one of billions of stars in one of billions of galaxies in the universe. Stars and planets the university of texas at dallas. I use it for my senior class and can strongly recommend it. Contents preface to the second edition page vii 1 introduction 1 1. Any errors present in the final product must have crept in during the production process, and are wholly the fault of the publisher. Download stars and galaxies pdf ebookstars and galaxies stars and galaxies ebook author by michael seeds stars and gal.
The study of stars, galaxies, planets, and more nmsu astronomy. Galaxies are categorized according to their visual morphology as elliptical, spiral, or irregular. How many generations of stars do galaxies host and when did they form. Mar 20, 2018 hence, the definition of the observable universe. Galaxies and the universe center grove elementary school. Every location in the universe has its own observable. The origin and evolution of the universe scientific american article dark forces at work david appell 26 exploring the early universe scientific american article making sense of modern cosmology p. A galaxy is a gravitationally bound system of stars, gas, and dust.
224 1104 359 923 1254 957 231 964 1513 1514 632 720 735 473 789 1443 473 1126 767 244 176 27 489 619 521 306 184 877 19 1410