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A galaxy with all its mass concentrated at its center. orbital speed O 20 100 distance from center (thousands of light-years) orbital speed O 20 100 distance from center (thousands of light-years) orbital speed O 20 100 distance from center (... Show more... Show more Science Astronomy AST 102 Answer & Explanation Solved by verified expert5 UCLES 2021 9702/42/M/J/21 [Turn over Answer all the questions in the spaces provided. 1 (a) Define gravitational field strength. [1] (b) An isolated planet is a uniform sphere of radius 3.39 × 106 m. Its mass of 6.42 × 1023 kg may be considered to be a point mass concentrated at its centre. The planet rotates about its axisConsider any star on a circular orbit around the center of the galaxy. The speed of the star's orbit depends on the star's distance from the galactic center and __________. the mass …1 Ara 2021 ... ... of the galaxy all the way into its center. They did this by measuring its gravitational pull on the stars: The faster the stars are moving ...The Milky Way, an average spiral galaxy, spins at a speed of 130 miles per second (210 km/sec) in our Sun’s neighborhood. New research has found that the most massive spiral galaxies spin faster than expected. These “super spirals,” the largest of which weigh about 20 times more than our Milky Way, spin at a rate of up to 350 miles per ...The force of gravity between two objects is determined by the mass of each object and the distance between their centers.The following theorem was proved by Newton in the Principia: A spherical mass can be thought of as built up of many infinitely thin spherical shells, each one nested inside the other. We will consider the gravitational attraction that such a shell exerts on a particle of mass m, a distance r from the center of the shell.If all of the mass in the galaxy were concentrated at its center, then the orbital velocity would be high near the center and would _____ away from the center. This kind of motion has been called _____ _____ because it follows Kepler's third law, as in the case of our Solar System, where nearly all of the mass is in the Sun. Question Answered step-by-step Select the approximate graph showing how orbital speed depends on distance from the galactic center for each of the following three hypothetical galaxies.Image transcription textA galaxy with all its mass concentrated at its center. orbital speed O 20 100 distancefrom center (thousands of light-years) orbital ...Use Newton's Law of Gravitation to compute the work (in J) required to launch a 1000-kg satellite vertically to an orbit 1000 km high. You may assume that Earth's mass is 5.98×1024kg and is concentrated at its center. Take the radius of the Earth to be 6.37×106m and G=6.67×10−11N⋅m^2/kg^2. Relevant Equationsa) gas clouds orbiting far from the galactic center have approximately the same orbital speed as gas clouds located further inward b) the disk of a spiral galaxy is quite flat rather than spherical like the halo c) all the galaxy's mass is concentrated in its flat, gaseous disk d) the amount of light emitted by stars at different distances is about the same throughout …1. Dark matter really exists, and we are observing the effects of its gravitational attraction. 2. Something is wrong with our understanding of gravity, causing us to mistakenly infer the existence of dark matter. • Because gravity is so well tested and understood, astronomers prefer option #1 for an explanation. 4 UCS 2020 9702/42/M/J/20 Answer all the questions in the spaces provided. 1 (a) Define gravitational potential at a point. [2] (b) An isolated solid sphere of radius r may be assumed to have its mass M concentrated at its centre. The magnitude of the gravitational potential at the surface of the sphere is φ. On Fig. 1.1, show the variation of the gravitational …Galaxy, any of the systems of stars and interstellar matter that make up the universe. Many such assemblages are so enormous that they contain hundreds of …For our calculation, then, we can assume that all the mass that lies inward of the Sun’s position is concentrated at the center of the Galaxy, and that the Sun orbits that point …the Sun. The gravitational force holding a planet in its orbit therefore decreases with distance from the Sun, and a smaller force means a lower orbital speed. Orbital speeds must drop similarly with distance in any other astronomical system that has its mass concentrated at its center. FIgUrE 18.1 InTEraCTIVE FIgUrEThe Sagittarius dwarf galaxy is currently about 70,000 light-years away from Earth and 50,000 light-years from the center of the Galaxy. It is the closest galaxy known ( [link] ). It is very elongated, and its shape indicates that it is being torn apart by our Galaxy’s gravitational tides—just as Comet Shoemaker-Levy 9 was torn apart when ... If you look at a system in which almost all the mass is concentrated at the center -- like our Solar System -- then the speed with which objects orbit the system decreases quickly with distance. Specifically, the orbital speed goes as the inverse square root of the orbital radius; we call this common situation "Keplerian rotation."

Lab 8: Hubble’s Law: The Galaxy’s Place in the Universe II. Five evenly-spaced galaxies in an expanding, rubber-band universe. Learn that the Big Bang was not an explosion in space but an explosion of space. Determine that our galaxy is not at the center of the universe and that the universe in fact has no measurable center.Jul 28, 2014 · Although we can't see dark matter, we know a bit about how much there is and where it's located. Measurement of the cosmic microwave background shows that 80 percent of the total mass of the ... ... mass of the sun. ... Our Galaxy, the Milky Way, has its own supermassive black hole called Sagittarius A* (pronounced Sag A star) at its center. All nearby ...Mar 17, 2021 · Webb is an international program led by NASA with its partners, ESA (European Space Agency) and the Canadian Space Agency. Contact: Claire Blome/Christine Pulliam. Space Telescope Science Institute, Baltimore, Maryland. 410-338-4366. [email protected] / [email protected]. Researchers using NASA’s upcoming James Webb Space Telescope will map ...

Shell theorem. In classical mechanics, the shell theorem gives gravitational simplifications that can be applied to objects inside or outside a spherically symmetrical body. This theorem has particular application to astronomy . A spherically symmetric body affects external objects gravitationally as though all of its mass were concentrated at ...evaluated at a point placed outside the sphere, the same as if the whole mass were concentrated at the sphere’s centre. This theorem follows the theorem in Ne wton’s Principia [ 2 ], statingevaluated at a point placed outside the sphere, the same as if the whole mass were concentrated at the sphere’s centre. This theorem follows the theorem in Ne wton’s Principia [ 2 ], stating…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Select the approximate graph showing how orbital. Possible cause: In these galaxies, the root mean square (or rms) velocities of the stars.