Elliptical galaxy is one of the three types of galaxies, the others being spiral galaxy like our milky way, and irregular galaxy. Parallax Universe Light-year Scientific notation Apparent magnitude Star Planet Solar system Binary star Galaxy Spiral galaxy Elliptical galaxy Irregular galaxy quasar elliptical galaxy n. A galaxy with an elliptical shape, containing relatively little gas and dust and having older … The rate of star formation may be the determining factor in what type of galaxy will form. What is meant by the redshift of a galaxy? Elliptical galaxies have no disk and no arms and very little gas and dust. We have to account for this bending of light in our calculations. from gravitational lensing we think that some of the dark matter in our Milky Way galaxy consists of MACHOS (massive compact halo objects) but we think the vast majority of it consists of WIMPs. In nearly one-half of all spirals, the arms unwind not form the nucleus but instead from a bar of gas, dust, and stars that extend across both sides of the nucleus. Galaxies also come in different colors. For instance, the milky way galaxy is located in a cluster called the local group. This discovery was arguably the most crucial discovery in astronomical history; it informed us that our universe is ever expanding. During accretion, gravity pulls matter into a core, which can be a star, planet or black hole. Record the value. Describe the rotation curve of the Milky Way Galaxy and contrast its shape with that of the Solar System. Gravity and dark matter shape galaxies and affect our environment. C) Some elliptical galaxies are surrounded by shells of stars. Add your Quizlet study sets to a tab — Add any Quizlet set as a tab so your students, classmates. The Universe is expanding, with the speeds of different galaxies being proportional to their current separations from us, and the constant of proportionality is called Hubble's constant. Dwarf ellipticals are probably the most common type of galaxy in the nearby universe. True/False: A globular cluster is a group of older stars that cluster together. • Gently drop the object in the cylinder and record the new volume. As viewed from space, the Earth rotates counter-clockwise. c) an elliptical galaxy smaller than the Milky Way. Fifth, both the Milky Way and Andromeda galaxies have grown in size by consuming other smaller galaxies. An orbit is the path one object in space takes around another. Spiral galaxies are blue; elliptical galaxies are red. How does the shape of the Milky Way Galaxy's rotation curve imply the presence of dark matter, given the distribution of visible light in the galaxy? Elliptical galaxies consist almost entirely of old stars and have shapes that are spheres or ellipsoids (somewhat squashed spheres) (Figure 4). since the rotation curve of our Milky Way Galaxy is flat and constant - it provides evidence for dark matter - we were able to use the rotation curve to map out the distribution of mass within our galaxy. A small percentage of galaxies with more disorganized shapes are classified as irregulars. What best describes the black hole status within the Milky Way? Spiral galaxies contain nebulae; elliptical galaxies do not. Roughly 20% of the galaxies in the universe are elliptical galaxies. They come in different shapes: spiral, elliptical, and irregular. We compare visible-light images of high-redshift (far away) galaxies with ultraviolet images of nearby galaxies or we compare infrared images of high-redshift galaxies with visible-light images of nearby galaxies. 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