Its diameter is 100,000 light years with a mass that exceeds two billion times that of the Sun. Our Milky Way Galaxy, a spiral galaxy, is among the massive and big galaxies with at least 250 billion solar masses (there are hints that the total mass may even be as large as 750 billion to 1 trillion times that of the Sun) and a disk diameter of 100,000 light years. The Size of the Milky Way Galaxy. Size of the Milky Way Upgraded, Solving Galaxy Puzzle. Depending upon one's definition of "known", the answer is either 13.7 billion light-years radius for the observable universe or 200 billion light-years radius for that collection of matter present at the Big Bang. From observations, astronomers know that the Milky Way is a barred spiral galaxy that is about 100,000 light-years across. Recall that Pluto's orbit is only 1.4 kilometers across on this scale---the Galaxy is MUCH larger than our solar system! Which of the following components of the Milky Way Galaxy outlines the spiral arms of the Galaxy? The diameter is about 100,000 light-years and the thickness about 1,000 light-years. Below is a picture of a spiral galaxy. Subject. Kendall Paul Oei says: April 3, 2013 at 7:05 PM . What is the massive black hole in the center of the Milky Way named? The gap is closing such that, in about four billion years, the CDs will touch. 10,000. It is part of a group of galaxies known as the Local Group. Favorite Answer. 22. Hubble's Universe: A Portrait of Our Cosmos.New York: Penguin, 1996: 9. Clearly, the Milky Way Galaxy is more complicated than the Solar System. Measurement of gas clouds orbiting the galactic center at very high speeds indicate that they would rapidly move out of the Galaxy unless some very massive object were holding them in orbit. B. This map shows the full extent of the Milky Way galaxy - a spiral galaxy of at least two hundred billion stars. What is it that makes the study of the structure of the Milky Way Galaxy more difficult than that of much more distant spiral galaxies? 3. Previously, it was thought that the sun orbits the center of our galaxy at about half the galactic radius. If the main-sequence turnoff of a star cluster occurs near the very top of the main sequence, then the cluster is. Which property is detectable for both dark matter and the supermassive black hole at the center of the Milky Way? What property of these stars can we measure to determine how much mass is at the center of the galaxy? The diameter of the luminous Milky Way is between 100,000 and 120,000 light years across, but that number could be much larger if you take into account dark matter. The size of the Milky Way is determined from studying _____ stars in globular clusters. There is nothing to compare. the Solar System is embedded in the dust and gas of the disk. What is the massive black hole in the center of the Milky Way named? Milky Way = 10^21 m. Known Universe = 10^26 m. Erica s. Lv 7. 100,000. Lv 7. 5) What is the length of the diameter of the Milky Way? Bars generally affect both the motions of stars and interstellar gas within spiral galaxies and can affect spiral arms as well. (A light-year is the distance traveled by light in one year and is roughly 9,460,000,000,000 km [5,880,000,000,000 miles].) A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars. The halo stars of the Milky Way have an observed radial velocity dispersion of about 200 km/s and a low average velocity of rotation of about 50 km/s. is quite flat at great distances from the center. Here are the steps you should take to get the answer. What do these observations likely imply about the very center of our galaxy? Most of the Milky Way is hidden behind dense gas and dust clouds in the galactic plane. This makes the diameter of the Milky Way to be about 9.461 x 10^17 km. A globular cluster with no variable stars would have been left out of Shapley's study because. a) Galaxy. Our galaxy is a whole lot bigger than it looks. 3. 60-64 Learn with flashcards, games, and more — for free. 2. Imagine the Milky Way galaxy as a music CD (the thickness compared to its diameter is about right). Dwarf Galaxy: Diameter: 7,000 ly: 4/15/2009 Habbal Astro 110-01 Chapter 14 Lecture 31 7 Stellar components of the Milky Way 1. In the Milky Way Galaxy, young, metal-rich stars are found. What is the distribution of giant molecular clouds in the Milky Way Galaxy and other similar galaxies? For many years, astronomers believed the Milky Way's disk spanned about 100,000 light-years. The Milky Way Galaxy The major arms consist of the highest densities of both young and old stars; the minor arms are primarily filled with gas and pockets of star-forming activity. a supernova. Our Milky Way is a large spiral galaxy. their velocities as they orbit the center. That is why thedisk appears so thin. the distance to the cluster could not be determined. It is not difficult to observe; it is impossible. The Milky Way is also referred to the portion of the Milky Way Galaxy that can be seen by the naked eye from the earth. Estimates for the diameter of the Milky Way galaxy range from 100,000 light years up to 120,000 light years. Even under the best conditions, and with the best equipment, you will never see the shape of the Milky Way. 5)Suppose we look at a photograph of many galaxies. Where are the youngest stars in the Milky Way Galaxy? It's puny compared to M87, an elliptical galaxy 980,000 light years in diameter. Scheduled maintenance: Saturday, December 12 from 3–4 PM PST. Radio emissions reveal that the Milky Way is. This tutorial will give you a better understanding of the size of the Milky Way Galaxy by investigating the distances to objects within the Galaxy and to other objects in the Universe. Favorite Answer. Our Galaxy is but one of many galaxies. • Distance from Sun to center ~ 30,000 light years • About 100 billion stars in total. Chapter 14 - The Milky Way Galaxy; Shared Flashcard Set. Advertisement. Description. The results, outlined in a new study, show that the disk is about 60 percent larger than previously thought. Astronomy - Sixth Edition (Chaisson/McMillan) Total Cards. In it are between 200 billion and 400,000 million stars. This structure can be viewed as consisting of six separate parts: (1) a nucleus, (2) a central bulge, (3) a disk (both a thin and a thick disk), (4) spiral arms, (5) a spherical component, and (6) a massive halo. That said, the stars in both the Andromeda galaxy and our Milky Way will be affected by the merger. The Milky Way is approximately 890 billion times the mass of the Sun. Now hold these CDs about eight feet apart. is one of many billions of galaxies in the universe. Its diameter is at least 100,000 light-years, and may contain as many as 200 billions stars today. Created. 4) What type of galaxy is the Milky Way? Estimates for the diameter of the Milky Way galaxy range from 100,000 light years up to 120,000 light years. The dimensions of the disk of the Milky Way Galaxy are diameter _____ and thickness _____. What do scientists believe is at the center of the Milky Way galaxy? That is why the disk appears so thin. 100,000. The thickness of the galaxy ranges depending on … It appears to be the actual nucleus of the Galaxy. Our Sun is buried deep within the Orion Arm about 26 000 light years from the centre. By Shannon Hall 04 May 2015. To compare the relative physical scale of the Milky Way, if the Solar System out to Neptune were the size of a US quarter (24.3 mm (0.955 in)), the Milky Way would be approximately the size of the contiguous Unite… "The Milky Way Galaxy to be about 100,000 light-years in diameter" 100,000 light year "Milky Way." Disk: rotating, thin collection of stars, gas & dust. What do we call the bright, sphere-shaped region of stars that occupies the central few thousand light-years of the Milky Way Galaxy? Now hold these CDs about eight feet apart. Giant molecular clouds occur primarily in the spiral arms. The diameter of the Milky Way is usually considered to be about 100000 light-years where 1 light-year = 9.461 x 10^12 km. Its shape is like a spiral, with two arms coming out of it. 100km? 2) Multiple the number of light years in a km by 100,000 (diameter of the Milky Way) 3) Divide the number you get from line 2 by 270,000 km (diameter of Saturn's rings). The Milky Way Galaxy, a spiral galaxy, homes our solar system together with lest 200 billion other stars. This is a picture of NGC 3184, a spiral galaxy similar to the Milky Way. b) Spiral galaxy. The artist's concept also includes a new spiral arm, called the "Far-3 kiloparsec arm," discovered via a radio-telescope survey of gas in the Milky Way. All the images we have of the Milky Way as a galaxy are merely artists’ impressions—very educated guesses as to what our galaxy looks like. 100,000 ly; 2000 ly In the Milky Way Galaxy, young, metal-rich stars are found Astronomy. Size of the Milky Way (side view) • Diameter ~ 100,000 light years • Thickness ~ 1,000 light years (flatter than a CD !) 12/16/2012. The dimensions of the disk of the Milky Way Galaxy are diameter _____ and thickness _____. Andromeda is a spiral galaxy of similar size, so we can think of it as a second CD. (Spiral galaxies and other types of galaxies are described in the article galaxy .) The Milky Way Galaxy appears to have a spiral structure with. It is part of a group of galaxies known as the Local Group. On this scale the nearest star to us is 4.3 mm or ~1/6 inch. Galactic corona. What do we call the bright, sphere-shaped region of stars that occupies thecentral few thousand light-years of theMilky Way Galaxy?the galaxy's bulge. Globular clusters are important to understanding the Milky Way because. Lv 7. d) 26000 light years. The gap is closing such that, in about four billion years, the CDs will touch. The hope is that the map will shed new light on the workings of the galaxy we call home. What do scientists believe is at the center of the Milky Way galaxy? Assuming that all galaxies formed at about the same time, which galaxy in the picture is the youngest? Title. New work finds that the Milky Way stretches nearly 2 million light-years across, more than 15 times wider than its luminous spiral disk. a supergiant star Advertisement. ... 30 kpc diameter . The mean diameter of the Sun is about 1.392 x 10^6 km. Which kind of stars are the major source of energy for the heating of the dust clouds and the H II emission nebulae in the planes of the Milky Way and other galaxies? they reveal the size of the Milky Way and Earth's location in it. This tutorial will give you a better understanding of the size of the Milky Way Galaxy by investigating the distances to objects within the Galaxy and to other objects in the Universe. The disk contains young and old stars; the halo contains mostly old stars. In our scaled model with the Sun 16.51 centimeters across, the Milky Way would be about 112 million kilometers across or about 38% of the size of the Earth's orbit around the Sun. A. a. Older stars are found farther from the midplane of a galactic disk because. That's your answer. E)The Milky Way Galaxy is about 100,000 light-years in diameter. If the milky way galaxy is 100,000 light years in diameter and 1 light year = 1 millimetre and there are 1000 millimetres in 1 meter. Eventually these two smaller galaxies might collide with the Milky Way. Milky Way components. It is the largest galaxy located in the Local Group after the Andromeda galaxy. a supernova. In it are between 200 billion and 400,000 million stars. 10,000. Shares. From observations, astronomers know that the Milky Way is a barred spiral galaxy that is about 100,000 light-years across. 2) How far is the Sun from the centre of the Milky Way? Chapter 14 - The Milky Way Galaxy. The Milky Way formed when the gas within a clump of dark matter collapsed into a large number of, Detailed observations of the structure of the Milky Way are difficult because. In the Hubble scheme for classifying galaxies, what type of galaxy is the Milky Way? Think the Milky Way is big? 9 years ago. If we represent the Milky Way Galaxy as the size of a grapefruit (10-cm diameter)? Recent observations seem to indicate that rather than being a spiral galaxy the Milky Way may be. A)the one that is reddest in color B)the one that appears smallest in size … But we do know that our Milky Way has a spiral nature from observations made from within our Galaxy (though whether or not it is a barred spiral is still being debated). Our Galaxy contains all stars in the universe. The diameter is about 100 times as greatas the thickness. What is the significance of the object Sagittarius A in the Milky Way Galaxy? Milky Way Quiz Questions with Answers. "The new data allow us to see the relics of the 10 billion-year-old ancient disc and so determine its smaller extent compared to the Milky Way’s current disc size." 5. The diameter is about100,000 light-years and the thicknessabout 1,000 light-years. Saturn's rings are about 270000 km in diameter; the Milky Way is 100000 light-years in diameter. If not, what object would be a good size comparitor for the Earth/solar system and the size of the milky way shown in this image? It is the largest galaxy located in the Local Group after the Andromeda galaxy. The sizes of stellar associations are large; the average diameter of those in the Galaxy is about 250 light-years. The Milky Way is only 100,000 light years in diameter. Saturns rings are a spec of dust on a gnats A$$ compared to the Milky Way galaxy 1.X-rays from material that is falling in. counting the density of stars in different directions along the Milky Way. 1,000. It appears to look like a milk band of light stretching across the sky. The stellar disk of the Milky Way Galaxy is approximately 100,000 light-years (9×1017 km) (6×1017 mi) in diameter, and is considered to be, on average, about 1,000 light-years (9×1015 km) thick. 1. THE MOST precise 3D map of our Milky Way galaxy has been revealed by astronomers. There are at least 100 billion objects, gas clouds, and dust, and there is not one single dominant mass in the center. Which component of the Milky Way Galaxy accounts for interstellar extinction, the dimming of light from distant objects? The research also gives a new sense of the sun's position within the Milky Way. The Andromeda Galaxy (M31) is best described as a, spiral collection of stars, dust, and gas 2 million ly away. NASA estimates the galaxy at 100,000 light-years across. And in terms of the stars present, the Andromeda galaxy's stars are much older, and its star-formation rate is much lower: only about 20-30% that of the Milky Way… a supergiant star Advertisement. Funk & Wagnalls, 1996. 1,000. b. Answer Save. Does the halo of the Milky Way Galaxy include other galaxies? 2 Answers. The Milky Way is approximately 890 billion times the mass of the Sun. That means that 100,000 / … If the milky way galaxy is 100,000 light years in diameter and 1 light year = 1 millimetre and there are 1000 millimetres in 1 meter. Which of the following pieces of evidence support(s) the theory that the Milky Way is a spiral galaxy? so … Sagittarius A* (pronounced "Sagittarius A-Star", abbreviated Sgr A*) is a bright and very compact astronomical radio source at the Galactic Center of the Milky Way.It is located near the border of the constellations Sagittarius and Scorpius, about 5.6° south of the ecliptic. Assuming that the globular clusters outlined the Galaxy, he determined that it has a diameter of about 100,000 light-years and that the Sun lies about 30,000 light-years from the centre. e. None of the stars in our Galaxy move. This disk is about ____ Ly across and we lie about _____ Ly (8.5 kpc) from its center. Bars are found in about half of all spiral galaxies. Relevance. The Andromeda galaxy contains about a trillion stars. The halo region includes several small galaxies amoung them the Magellanic Clouds, two, small, irregular galaxies. Estimates of the size of the Milky Way galaxy vary due to a degree of uncertainty in the observations used to make these determinations. Advertisement. 3m? To represent this, the beautiful spiral galaxy Messier 74 was used, as it thought to be a similar galaxy to ours.Below is a picture of the real Mil… The Milky Way is about 100,000 light years in … That's your answer. 30m? Evidence of a supermassive black hole at the center of the Milky Way comes from. The size of the Milky Way is determined from studying _______ stars in globular clusters. 4. The Milky Way is the second-largest galaxy in the Local Group (after the Andromeda Galaxy), with its stellar disk approximately 170,000–200,000 light-years (52–61 kpc) in diameter and, on average, approximately 1,000 ly (0.3 kpc) thick. in the disk of the Galaxy, inside a spiral arm or segment of a spiral arm. 1) Find out how many kilometers are in a light year (hint: a lot) 2) Multiple the number of light years in a km by 100,000 (diameter of the Milky Way) 3) Divide the number you get from line 2 by 270,000 km (diameter of Saturn's rings). Then in 2015, researchers showed that a distance of 150,000 light-years was closer to the mark. b) Galactic Centre. This is a picture of NGC 3184, a spiral galaxy similar to the Milky Way. Both the LMC and the SMC have star-forming regions, and the LMC was the site of the spectacular 1987a supernova explosion. When we look out into the plane of the Milky Way Galaxy, how far can we see? The Milky Way is only 100,000 light years in diameter. RR Lyrae (RR Lyrae variables in globular clusters allow astronomers to reliably determine the distances to these clusters, which are distributed throughout the galaxy and its halo). 1) What is the Milky Way? 2. Yes. Scheduled maintenance: Saturday, December 12 from 3–4 PM PST. The diameter in the equatorial plane is estimated to be 40,000 light years. In the 1780s, Sir William Herschel tried to measure the Sun's position in the Milky Way Galaxy by. a black hole. Which of the following statements are true of the Milky Way? Imagine the Milky Way galaxy as a music CD (the thickness compared to its diameter is about right). The 3D Milky Way map was created using data from the European Space Agency’s Gaia space probe that's been scanning the stars since 2013. The Milky Way is the second-largest galaxy in the Local Group (after the Andromeda Galaxy), with its stellar disk approximately 170,000–200,000 light-years (52–61 kpc) in diameter and, on average, approximately 1,000 ly (0.3 kpc) thick. As to the size of the galactic bulge that makes up the core of the galaxy, it's diameter is estimated at around 30,000 light years in the north-south direction. Star formation in the stellar halo of the Milky Way ceased long ago. It's puny compared to M87, an elliptical galaxy 980,000 light years in diameter. The artist's concept also includes a new spiral arm, called the "Far-3 kiloparsec arm," discovered via a radio-telescope survey of gas in the Milky Way. In general, older stars have lower ____ than younger stars. In 1923, the universe was still thought to be a small place. Ever since four hundred years ago the settlement that the Earth is moving about the sun, and one hundred and fifty years ago that the sun is moving about the center of the Galaxy, it shouldn't be surprising if we learned that the Galaxy is also moving. Microsoft Encarta 96 Encyclopedia CD-Rom. The Milky Way Galaxy, where the Solar System is located, is classified as a barred spiral galaxy. The Milky Way Galaxy The major arms consist of the highest densities of both young and old stars; the minor arms are primarily filled with gas and pockets of star-forming activity. c. All stars in our Galaxy take the same time to complete one orbit. What is the diameter of the Milky Way galaxy in light-years? Andromeda is a spiral galaxy of similar size, so we can think of it as a second CD. 10 cm is to 100,000 LY as ___ is to 2,500,000 LY. a. The Milky Way Galaxy’s structure is fairly typical of a large spiral system. Sciencenut. Which statement about the Milky Way Galaxy is correct? The Milky Way and the Andromeda Galaxy are at either end of a group of about 30 galaxies gravitationally bound together in the Local Group. 3) What is the centre of the Milky Way called? Which of the following objects is most likely to exist at the very center of our galaxy, considering your knowledge of the properties of these objects. Towards the centre of the Galaxy the stars are packed together much closer than they are where we live. Which parts of the Milky Way contain old stars, and which contain young stars? What is the diameter of the Milky Way galaxy in light-years? Where is the solar system located in the Milky Way Galaxy? Pg. the galaxy's bulge. The Sun's position in the Milky Way Galaxy is. Level. 3. A galactic corona is a distribution of gas extending far away from the center of the galaxy. The new 3D map was revealed just as another set of researchers claimed that Earth is closer to the black hole at the centre of our galaxy than previously thought. That means that 100,000 / 1000 = 100 meters so the answer is d. 1 0. 1 decade ago. The numbers are pretty astounding. Liz. What is the evidence that indicates to some astronomers that a supermassive black hole exists at the center of the Milky Way Galaxy? The Milky Way is consuming gas that is flowing from the Magellanic clouds (in the Magellanic Stream). Sagittarius A* (pronounced "Sagittarius A-Star", abbreviated Sgr A*) is a bright and very compact astronomical radio source at the Galactic Center of the Milky Way.It is located near the border of the constellations Sagittarius and Scorpius, about 5.6° south of the ecliptic. This brings the Milky Way's size up to that of Andromeda. A view outside the galaxy … The Milky Way and similar spirals have two main components; the ____ component includes the Sun and other stars close to the plane of the Milky Way, the open star clusters, and the gas and dust which hide most of the disk from visual observation. Details. a black hole. The Milky Way is thought to be home to a halo of dark matter – matter that cannot be detected except through its gravitational influence – which makes up … This is approximately the size of a typical football field. In the disk of the Milky Way, stars are ______ and dust and gas are _____ than in the halo. a barred spiral with a definite, straight bar across its center. The diameter is a bit larger (120,000 light years) if you take into account tidal streams – basically other galaxies the Milky Way is eating, such as the Sagittarius Dwarf Elliptical Galaxy. Because we dwell within the Milky Way Galaxy, it is impossible for us to take a picture of its spiral structure from the outside. 10 years ago. The answer is, of course, 100 meters. spherical distribution of stars and globular clusters centered on a nuclear bulge. Since one light year is about 9.5 x 10 12 km, so the diameter of the Milky Way galaxy is about 9.5 x 10 17 km in diameter. The best evidence for dark matter in the Milky Way comes from the observation that the rotation curve. the stars have lived long enough to move there. Its diameter is 100,000 light years with a mass that exceeds two billion times that of the Sun. The Andromeda Galaxy is the closest large galaxy to the Milky Way: a ball 19 centimeters in diameter (a volleyball) about 4.8 meters away. enormous amounts of energy are pouring out of a compact but very massive source at its center. "The diameter of the disk is about 100,000 light-years" 100,000 light year: Goodwin, Simon. These educated guesses come from making observations and then using the laws of physics to understand what they mean. Most of the mass in the center of our galaxy is invisible. This is a 3D map of the Milky Way and all its moving stars Credit: ESA. If we represent the Milky Way Galaxy as the size of a grapefruit (10-cm diameter), the distance to the Andromeda Galaxy would be about.... 10 cm? Undergraduate 3. hot, young O and B stars, via the UV radiation, One curious fact about the Milky Way Galaxy, discovered in the past few years, is that. 1.The 21-cm radiation emitted from neutral hydrogen clouds shows the existence of spiral arms. Below is a picture of a spiral galaxy. 1km? The Milky Way Galaxy is nearly 68 trillion times larger than . Of course, the Milky Way isn’t all dark matter – there’s lots of gas, dust, and stars that populate the galactic disk. The Milky Way's structure. Milky Way Galaxy is a good-sized 100,000 light-years diameter. d. Most stars in our Galaxy are in the central bulge. As the Local Group clouds in the hubble scheme for classifying galaxies, what type galaxy. Observe ; it is part of a typical football field games, and the thicknessabout 1,000 light-years dwarf:... Should take to get the answer which parts of the Milky Way be! 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