Units and Measurement
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Question : 20
Total: 33
The nearest star to our solar system is 4.29 light years away. How much is this distance in terms of parsecs? How much parallax would this star (named Alpha Centauri) show when viewed from two locations of the Earth six months apart in its orbit around the Sun?
Solution:
Distance = 4.29 light year
= 4.29 × 9.46 × 10 15 m
( ∵ 1 = 9.46 × 10 15 m )
=
parsec
( ∵ 1 = 3.08 × 10 16 m )
= 1.318 Parsec = 1.32 parsec
Parallax of the star,
θ =
=
=
= 1.515 "
Parallax of the star,
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