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 Online Tutoring : Forum : Homework Help - Physical Sciences : Physics
Topic Topic: Calculating AU to parsecs & light-years Post ReplyNew Question
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Joined: 05 September 2007
Location: United States
Posts: 1
Posted: 05 September 2007 at 4:26am | IP Logged Quote Britnikd

An AU is equal to the average distance from Earth to the Sun, about 92.9 x 10^6 mi.  A parsec (pc) is the distance at which a length of 1 AU would subtend an angle of exactly 1 second of arc. A light-year (ly) is the distance that light, traveling through a vacuum with a speed of 186000 mi/s, would cover in 1.0 year.  Express the Earth-Sun distance in parsecs and light-years.

Edited by Britnikd on 05 September 2007 at 4:27am
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