The astronomical unit (AU) is defined as the mean center-to-center distance from Earth to the Sun, namely 1.496x10^(11) m. The parsec is the radius of a circle for which a central angle of 1 s intercepts an arc of length 1 AU. The light-year is the distance that light travels in 1 y.
(a) How many parsecs are there in one astronomical unit?
(b) How many meters are in a parsec?
(c) How many meters in a light-year? (d) How many astronomical units in a light-year? (e) How many light-years in a parsec?
Answers: 2
) is defined as 1 astronomical unit:
 (1)
(2)
 
 (3)
⇒ 
⇒ 
) and x is the distance that light travels in 1 year.
⇒ 
⇒ 
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The astronomical unit (AU) is defined as the mean center-to-center distance from Earth to the Sun, n...
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