What is the evidence for the existence of dark matter in galaxies and in the Universe? Since early 1930s physicists attempted to understand and solve the “missing mass problem” in the galaxy and universe. This missing mass problem has spurred on astronomers and particle physicists on a quest to gain greater understanding of the universe. One of the key postulations to solve this missing mass problem is dark matter. Scientist has continually conducted experiments attempting to provide evidence
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“the distances between galaxies‚ or clusters of galaxies‚ are continually increasing and that therefore the universe is expanding.” (Infoplease) He proposed this after noticing that colors emitted from stars do not have the same wavelengths as one another in the red end of the color spectrum. People call these “red shifts.” People have speculated that these red shifts occur due to galaxies moving further away from our Milky Way galaxy. Hubble’s constant is how fast the galaxies move away from one another
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observe and study the movements in space from our own planet in order to further our understanding of the universe. Through astronomy‚ we hoped to find the many mysteries and properties of the world. Astronomy is the study of moons‚ planets‚ stars‚ galaxies‚ nebulae‚ their many features and properties‚ and situations that happens outside of Earth. The study was dated back to the times of the Egyptians‚ however their beliefs in God prevented them from further looking into the universe‚ because to them
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Professor - The Milky Way is the galaxy that contains the Earth. This name derives from its appearance as a dim milky glowing band stretching across the night sky‚ in which the naked eye cannot distinguish individual stars. The term Milky Way is a translation of classical Latin ____ from the Hellinistic Greek‚ Milky Circle. The Milky Way appears like a band disk-shaped structure being viewed from inside. The fact that this faint band of light is made up of stars in 1610 when Galileo Galilei used
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Dark Energy VS Dark Matter Dark Matter Dark Matter is the name given to mass that emits no detectable radiation. ‘’Dark Matter accounts for the galaxies rotating about "local groups" in tighter orbits than we expect from our observations. Gravity is stronger than we can account for unless there is some matter we cannot see. We are much more certain what dark matter is not than we are of what it is” (Feild‚ Ann‚ 2013). Scientists think dark matter is made of particles called WIMPS‚ "weakly
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It is appropriate for grade levels 3-8‚ depending upon prior knowledge and interest level of student. Lesson Plan Purpose: Introduction to Astronomy The objective of this science lesson plan is to introduce the concepts of space‚ our solar system‚ galaxies and other celestial objects. Students will learn about the importance of space technology and space education. Students will use various space related activities to explore the basic concepts and to demonstrate their acquired knowledge. Students
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and convinced astronomers that black holes exist. In particular‚ a technique used by astronomers to locate both stellar and super-massive black holes is to observe the motion of stars in the area around the supposed black hole.[4] Most stars in our galaxy are formed in groups of two or more stars‚ by observing the visible partner of a binary system‚ astronomers can effectively trace a black hole. Astronomers can calculate the mass of a black hole quite simply‚ using Keplar’s laws of motion‚ this is
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Galaxies A Galaxy is a gravitational bound system composed by stars‚ stellar remnants‚ an interstellar medium of gas and dust‚ and a component called dark matter. Galaxies are categorized according to their shape‚ some of them are elliptical galaxy which has an ellipse-shaped light profile‚ spiral galaxies are disked shaped with curvy arms‚ smaller galaxies are referred as irregular galaxies. Galaxies don’t float through space‚ they are together in groups known as clusters‚ some clusters are large
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mass of the Milky Way disk galaxy is at least 50% unseen mass or material. The Dark halo of mass surrounding the Milky Way supports the velocity of the galaxies spin as well as keeps it in shape. The discrepancy in the spiral of galaxies is that they do not have enough mass (even at their centers) to keep the millions of solar systems withheld in its gradational field. So physicists had a problem. What was the explanation for the velocity and rotational curve in galaxies? Observations indicate halos
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Do you ever notice how sometimes when you are sitting in the car and hear the ambulance it seems to take forever for it to come around you? Or how about times when you yell “HEY YOU” or “MOM” in a grocery store standing in the middle of the aisle people from all directions can hear you….and some even answer? Or lastly how about this example‚ have you ever seen an insect in the water kicking and it seems if the ripple is getting bigger and bigger and the waves are going in all directions not just
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