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

One astronomical unit (AU) is equal to

`1.496xx10^(8)km`

`9.46xx10^(12)km`

`3.084xx10^(13)km`

`4.596xx10^(15)km`

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The correct Answer is:

1AU=`1.496xx10^(11)m=1.496xx10^(8)km`

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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.

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