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Medium quiz exploring galaxies, their types, structures, and their place in the wider universe.
1. What term describes galaxies with no clear, defined shape, often the result of gravitational interactions or collisions with other galaxies?
💡 An irregular galaxy has no clear, defined shape, often resulting from gravitational interactions or collisions with other galaxies.
2. What is the name of the galaxy that contains our solar system?
💡 The Milky Way is the name of the galaxy that contains our solar system.
3. What term describes the visible band of light stretching across the night sky, formed by the combined light of countless stars within our galaxy's disk?
💡 The visible band of light stretching across the night sky, formed by countless stars within our galaxy's disk, is what gives our galaxy its common name, the Milky Way, as viewed from Earth.
4. What term describes the overall shape classification of galaxies like the Milky Way, characterized by a rotating disk with spiral arms?
💡 A spiral galaxy, like our Milky Way, is characterized by a rotating disk with distinctive spiral arms.
5. What term describes a dense, spherical collection of stars, typically found orbiting within a galaxy's halo?
💡 A globular cluster is a dense, spherical collection of stars, typically found orbiting within a galaxy's outer halo region.
6. What term describes the extremely bright, compact region at the center of some distant galaxies, powered by a supermassive black hole?
💡 An Active Galactic Nucleus (AGN) is the extremely bright, compact region at the center of some distant galaxies, powered by a supermassive black hole.
7. What is the estimated approximate diameter of the Milky Way galaxy?
💡 The Milky Way galaxy has an estimated approximate diameter of about 100,000 light-years.
8. What general term describes a massive system of stars, gas, dust, and dark matter bound together by gravity?
💡 A galaxy is a massive system of stars, gas, dust, and dark matter bound together by gravity.
9. What term describes galaxies with a smooth, featureless, rounded or oval appearance, lacking distinct spiral arms?
💡 An elliptical galaxy has a smooth, featureless, rounded or oval appearance, lacking the distinct spiral arms found in spiral galaxies.
10. What term describes the central bright, densely packed region of stars found at the core of many galaxies, including spiral galaxies?
💡 The galactic bulge describes the central bright, densely packed region of stars found at the core of many galaxies, including spiral galaxies like the Milky Way.
11. What is the name of the large spiral galaxy that is the closest major galaxy to the Milky Way and is on a collision course with it?
💡 The Andromeda Galaxy is the closest major galaxy to the Milky Way and is predicted to eventually collide with it in the distant future.
12. What term describes the theoretical, invisible form of matter believed to make up a significant portion of a galaxy's total mass?
💡 Dark matter is the theoretical, invisible form of matter believed to make up a significant portion of a galaxy's total mass, detected through its gravitational effects.
13. What term describes an extremely luminous and distant type of Active Galactic Nucleus, among the brightest objects in the universe?
💡 A quasar is an extremely luminous and distant type of Active Galactic Nucleus, among the brightest objects known in the universe.
14. What term describes the large-scale grouping of galaxies bound together by gravity, of which the Milky Way is a part?
💡 The Local Group is the term for the large-scale grouping of galaxies, including the Milky Way and Andromeda, bound together by gravity.
15. What term describes the process by which two or more galaxies gravitationally interact and eventually combine into a single, larger galaxy?
💡 A galaxy merger describes the process by which two or more galaxies gravitationally interact and eventually combine into a single, larger galaxy.