1. Assuming the orbit is circular, what isthe period of the solar system\'s orbi
ID: 1744763 • Letter: 1
Question
1. Assuming the orbit is circular, what isthe period of the solar system's orbit? Give your answer inyears. 2. Our solar system was formed roughly 5billion years ago. How many orbits has it completed? 3. The gravitational force on the solarsystem is the net force due to all the matter inside our orbit.Most of that matter is concentrated near the center of the galaxy.Assume that the matter has a spherical distribution, like a giantstar. What is the approximate mass of the galactic center? 4. Assume that the sun is a typical star witha typical mass. If galactic matter is made up of stars,approximately how many stars are in the center of the galaxy?Hint: Astronomers have spent many yearstrying to determine how many stars there are in the Milky Way. Thenumber of stars seems to be only about 10% of what you'll find inpart d. In other words, about 90% of the mass of the galaxy appearsto be in some form other than stars. This is called the darkmatter of the universe. No one knows what the dark matter is.This is one of the outstanding scientific questions of ourday. 3. The gravitational force on the solarsystem is the net force due to all the matter inside our orbit.Most of that matter is concentrated near the center of the galaxy.Assume that the matter has a spherical distribution, like a giantstar. What is the approximate mass of the galactic center? 4. Assume that the sun is a typical star witha typical mass. If galactic matter is made up of stars,approximately how many stars are in the center of the galaxy?
Hint: Astronomers have spent many yearstrying to determine how many stars there are in the Milky Way. Thenumber of stars seems to be only about 10% of what you'll find inpart d. In other words, about 90% of the mass of the galaxy appearsto be in some form other than stars. This is called the darkmatter of the universe. No one knows what the dark matter is.This is one of the outstanding scientific questions of ourday.
Explanation / Answer
#3 is 1.87*10^41 Kg
#4 is 9.4*10^10 stars ( You just divide #3's answer by 1.99*10^30kg, the sun's mass)
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