One astronomical unit (AU) is equal to...

One astronomical unit (AU) is equal to

`9.46xx10^(15)m`

`1.496xx10^(11)m`

`3xx10^(8)m`

`3.08xx10^(16)m`

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Astronomical distances are so large compared to terrestrial ones that much larger units of length are used for easy comprehension of the relative distances of astronomical objects. An astronomical unit (AU) is equal to the average distance from Earth to the Sun, 1.50xx10^(8)km . A parsec (pc) is the distance at which 1 AU would subtend an angle of 1 second of arc. A light year (ly) is the distance that light, traveling through a vacuum with a speed of 3.00xx10^(5) km/s, would cover in 1 year. Express a light - year and a parsec in kilometers.

1 AU. is equal to

A trinary star system which is a system of three orbiting around centre of mass of system has time peroid of 3 years, while the distance between any two stars of the system is 2 astronomical unit. All the three stars are identical and mass of the sun is M and total mass of this multiple star system is (a)/(b)xxM . Then find (b)/(3) ? (a and b are lowest possible integers (I astronomical unit is equal to distance between sun and earth, time period of rotation of earth around sun is 1year)

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Suppose we invent a unit of mass which we shall call the caendish (C). One cavendish of mass is defined such that G = 1.0000(AU)^(3)//(yr^(2)C) . Our unit of length is the astronomical unit (AU) , the earth-sun distance -1AU = 1.496 xx 10^(11) m - and our unit of time is the year (yr) . (a) Datermine the conversion factor between C and kg. (b) Find the mass of the sun in C.

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