There is nothing to compare. 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. 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. their velocities as they orbit the center. (Spiral galaxies and other types of galaxies are described in the article galaxy .) Where are the youngest stars in the Milky Way Galaxy? It appears to look like a milk band of light stretching across the sky. 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. The Milky Way is only 100,000 light years in diameter. The diameter is about100,000 light-years and the thicknessabout 1,000 light-years. Recent observations seem to indicate that rather than being a spiral galaxy the Milky Way may be. Advertisement. Favorite Answer. 2. This is a 3D map of the Milky Way and all its moving stars Credit: ESA. in the disk of the Galaxy, inside a spiral arm or segment of a spiral arm. Sciencenut. Dwarf Galaxy: Diameter: 7,000 ly: 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. Our galaxy is a whole lot bigger than it looks. That is why thedisk appears so thin. 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. What is the diameter of the Milky Way galaxy in light-years? That said, the stars in both the Andromeda galaxy and our Milky Way will be affected by the merger. 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. 4. Which statement about the Milky Way Galaxy is correct? 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. A galactic corona is a distribution of gas extending far away from the center of the galaxy. It is the largest galaxy located in the Local Group after the Andromeda galaxy. In the Hubble scheme for classifying galaxies, what type of galaxy is the Milky Way? The diameter is about 100 times as greatas the thickness. This is a picture of NGC 3184, a spiral galaxy similar to the Milky Way. A)the one that is reddest in color B)the one that appears smallest in size … What is the diameter of the Milky Way galaxy in light-years? Recall that Pluto's orbit is only 1.4 kilometers across on this scale---the Galaxy is MUCH larger than our solar system! A view outside the galaxy … 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. 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 black hole. 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 approximately 890 billion times the mass of the Sun. 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. The gap is closing such that, in about four billion years, the CDs will touch. Milky Way components. enormous amounts of energy are pouring out of a compact but very massive source at its center. 3m? 60-64 Learn with flashcards, games, and more — for free. 10 cm is to 100,000 LY as ___ is to 2,500,000 LY. In 1923, the universe was still thought to be a small place. In it are between 200 billion and 400,000 million stars. 10,000. 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 Galaxy, a spiral galaxy, homes our solar system together with lest 200 billion other stars. 100,000 ly; 2000 ly In the Milky Way Galaxy, young, metal-rich stars are found 1 decade ago. From observations, astronomers know that the Milky Way is a barred spiral galaxy that is about 100,000 light-years across. A globular cluster with no variable stars would have been left out of Shapley's study because. 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). 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). If we represent the Milky Way Galaxy as the size of a grapefruit (10-cm diameter)? Our Galaxy contains all stars in the universe. Where is the solar system located in the Milky Way Galaxy? Andromeda is a spiral galaxy of similar size, so we can think of it as a second CD. 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. Which property is detectable for both dark matter and the supermassive black hole at the center of the Milky Way? That's your answer. What do scientists believe is at the center of the Milky Way galaxy? This disk is about ____ Ly across and we lie about _____ Ly (8.5 kpc) from its center. It's puny compared to M87, an elliptical galaxy 980,000 light years in diameter. Our Galaxy is but one of many galaxies. From observations, astronomers know that the Milky Way is a barred spiral galaxy that is about 100,000 light-years across. The Milky Way Galaxy appears to have a spiral structure with. Even under the best conditions, and with the best equipment, you will never see the shape of the Milky Way. The diameter in the equatorial plane is estimated to be 40,000 light years. Answer Save. Imagine the Milky Way galaxy as a music CD (the thickness compared to its diameter is about right). a. Andromeda is a spiral galaxy of similar size, so we can think of it as a second CD. The halo region includes several small galaxies amoung them the Magellanic Clouds, two, small, irregular galaxies. The dimensions of the disk of the Milky Way Galaxy are diameter _____ and thickness _____. In it are between 200 billion and 400,000 million stars. New work finds that the Milky Way stretches nearly 2 million light-years across, more than 15 times wider than its luminous spiral disk. 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. Size of the Milky Way (side view) • Diameter ~ 100,000 light years • Thickness ~ 1,000 light years (flatter than a CD !) a) Galaxy. b. What is the distribution of giant molecular clouds in the Milky Way Galaxy and other similar galaxies? Evidence of a supermassive black hole at the center of the Milky Way comes from. Saturn's rings are about 270000 km in diameter; the Milky Way is 100000 light-years in diameter. This is approximately the size of a typical football field. 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… Most of the Milky Way is hidden behind dense gas and dust clouds in the galactic plane. What do scientists believe is at the center of the Milky Way galaxy? is quite flat at great distances from the center. Scheduled maintenance: Saturday, December 12 from 3–4 PM PST. Chapter 14 - The Milky Way Galaxy; Shared Flashcard Set. Giant molecular clouds occur primarily in the spiral arms. Astronomy. For many years, astronomers believed the Milky Way's disk spanned about 100,000 light-years. In the 1780s, Sir William Herschel tried to measure the Sun's position in the Milky Way Galaxy by. The size of the Milky Way is determined from studying _____ stars in globular clusters. Which of the following components of the Milky Way Galaxy outlines the spiral arms of the Galaxy? 100,000. The Milky Way is only 100,000 light years in diameter. e. None of the stars in our Galaxy move. 3. Older stars are found farther from the midplane of a galactic disk because. Saturns rings are a spec of dust on a gnats A$$ compared to the Milky Way galaxy 30m? The hope is that the map will shed new light on the workings of the galaxy we call home. the Solar System is embedded in the dust and gas of the disk. 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). a black hole. By Shannon Hall 04 May 2015. "The diameter of the disk is about 100,000 light-years" 100,000 light year: Goodwin, Simon. Globular clusters are important to understanding the Milky Way because. (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].) E)The Milky Way Galaxy is about 100,000 light-years in diameter. Its shape is like a spiral, with two arms coming out of it. Its diameter is 100,000 light years with a mass that exceeds two billion times that of the Sun. Clearly, the Milky Way Galaxy is more complicated than the Solar System. The Milky Way Galaxy, where the Solar System is located, is classified as a barred spiral galaxy. Which of the following statements are true of the Milky Way? 1. NASA estimates the galaxy at 100,000 light-years across. Our Sun is buried deep within the Orion Arm about 26 000 light years from the centre. 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. There are at least 100 billion objects, gas clouds, and dust, and there is not one single dominant mass in the center. Here are the steps you should take to get the answer. B. It is not difficult to observe; it is impossible. In the Milky Way Galaxy, young, metal-rich stars are found. The Milky Way is consuming gas that is flowing from the Magellanic clouds (in the Magellanic Stream). A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars. Which parts of the Milky Way contain old stars, and which contain young stars? b) Galactic Centre. The Milky Way Galaxy is nearly 68 trillion times larger than . 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. The sizes of stellar associations are large; the average diameter of those in the Galaxy is about 250 light-years. b) Spiral galaxy. 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