The galaxy that we live in is known as the Milky Way galaxy. It surrounds most disk galaxies as well as some elliptical galaxies of type cD. 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. There is no galaxy 200 light-years from the Milky Way. The Andromeda–Milky Way collision is a galactic collision predicted to occur in about 4.5 billion years between the two largest galaxies in the Local Group—the Milky Way (which contains the Solar System and Earth) and the Andromeda Galaxy. It looks like a misshapen potato chip. The ESA said: "The new Gaia data have allowed astronomers to trace the various populations of older and younger stars out towards the very edge of our galaxy – the galactic anticentre. Sagittarius Dwarf: In 1994, British astronomers discovered a galaxy in the constellation of Sagittarius, located only about 50,000 light-years from the center of the Milky Way and falling into our Galaxy. _____ miles. It’s a medium-large spiral with several smaller satellite galaxies, and the disk spans some 120,000 light-years. The Milky Way’s disk is usually depicted as flat. In previous work, researchers at The Ohio State University found that parts of the Milky Way’s halo – the … From everything we’ve been able to tell, the Milky Way is a fairly typical galaxy. It contains mostly young stars, gas, and dust, which are concentrated in spiral arms. Milky Way structure. The new findings were presented at a meeting of the American Astronomical Society, held online June 1 to 3 because of the COVID-19 pandemic.. ), and a stellar halo which is home to about 150 globular clusters. ), a thick disk, a bulge (diameter 25,000 light years approx. It is 8.178 ± 0.035 kiloparsecs (26,670 ± 110 ly) away from Earth in the direction of the constellations Sagittarius, Ophiuchus, and Scorpius where the Milky Way appears brightest. The map can be used to measure acceleration in the Milky Way Credit: ESA. To get a little perspective, one light-year equals 5.878625 trillion miles (or 9.461 trillion kilometers). In recent years, deep studies of Andromeda using the giant Keck telescopes in Hawaii revealed an extended population of stars that stretched the galaxy's total diameter to about 200,000 light years. If a scale model represents the Milky Way and Andromeda galaxies as … R. Hurt / SSC-Caltech, NASA/JPL-Caltech For many years, astronomers believed the Milky Way's disk spanned about 100,000 light-years . The distance to the Andromeda galaxy, which is the spiral galaxy nearest to the Milky Way, is about 1.9E+6 ly. Disk — A flattened region that surrounds the bulge in a spiral galaxy. The diameter of our disk-shaped galaxy, the Milky Way, is about 1.7E+5 light-years (ly). By Adam Mann Oct. 9, 2020 , 8:00 AM. need some help in science, pretty easy questions, mutiple choice Which of the following is NOT found in the Milky Way galaxy's galactic halo? The Milky Way hasn’t been kind to the Sagittarius dwarf galaxy. The galaxy's bright, starry disk is about 120,000 light years in diameter, making it slightly larger than the Milky Way. Since the Earth lies in the disk of the Milky Way, dust prevents us from determining the large scale structure of the Galaxy's spiral pattern beyond a few thousand light-years. If you are only talking about the visible part of the Milky Way – all the stars, gas and dust that make up the disk – then the Milky Way’s mass is between 200-600 billion times that of the Sun. The distance to Messier 31, which is Andromeda, the spiral galaxy nearest to the Milky Way, is about 2.0 million ly. The halo that surrounds our own Milky Way galaxy is much hotter than scientists once believed – and it may not be unique among galaxies. The Milky Way is approximately 890 billion times the mass of the Sun. The Sun's location in the Milky Way in the galactic disk, roughly halfway between the center and the outer edge of the disk. Background Milky Way image from "A Roadmap to the Milky Way." 0 Milky Way’s shredded companion provides clues about dark matter. The halo is the structure that groups the galaxy, it has an exterior part and an interior part. Pictures of the entire sky from eROSITA revealed giant spheres of gas extending more than 45,000 light years above and below the disc of the galaxy. For comparison, the Milky Way … The Andromeda Galaxy (IPA: / æ n ˈ d r ɒ m ɪ d ə /), also known as Messier 31, M31, or NGC 224 and originally the Andromeda Nebula (see below), is a barred spiral galaxy approximately 2.5 million light-years (770 kiloparsecs) from Earth and the nearest major galaxy to the Milky Way. There are 59 small galaxies confirmed to be within 420 kiloparsecs (1.4 million light-years) of the Milky Way, but not all of them are necessarily in orbit, and some may themselves be in orbit of other satellite galaxies. Galaxy is _____. If a scale model represents the Milky Way and Andromeda galaxies as dinner plates 26 cm in diameter, determine the distance between the centers of the two plates. Astronomers found a galaxy similar to our own Milky Way located more than 12 billion light-years away from our own. This image covers a region approximately 70° × 50° and combines a black-and-white view of the disk of our Galaxy with a red contour map showing the brightness of the dwarf galaxy. The Milky Way is a fairly typical spiral galaxy with distinct structural components. The Milky Way Galaxy is about 25 million times larger in diameter than the planetary region of our solar system. Astronomers say the galaxy is “unambiguous evidence” and that such massive galaxies existed only 1.5 billion years after the Big Bang, which is in dispute of current models of galaxy formation. If you represent out solar system with a poker chip (diameter about 1.5 inches), how big a disk would you need to represent out galaxy? 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. The disk of the Milky Way is 100,000 light-years across and 2000 light-years thick. The young thin disc is a region in which star formation is taking place and contains the MW's youngest stars and most of its gas and dust. The Milky Way has several smaller galaxies gravitationally bound to it, as part of the Milky Way subgroup, which is part of the local galaxy cluster, the Local Group.. "Computer models predicted that the disc of the Milky Way will grow larger with time as new stars are born. Because of this, stars inside the Sun's orbit complete trips around the bulge more quickly than we do. An enormous disk galaxy from the ancient universe that is pretty similar to our Milky Way galaxy has been observed for the first time. If this is correct, the Milky Way probably formed when star clusters came together to form the galaxy’s core. He arrived at his size determination by establishing the spatial distribution of globular clusters. 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