Question

$hey \: mates...$

why it is convenient to express the distance of stars in terms of light year or parsec rather than in km?


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Answer 1

Answer:

The distance from one Astronomical bodies to the other is very large. So it is the main reason of using the Astronomical units.. and one light year is about 10 trillions km.

Answer 2

Question:-

why it is convenient to express the distance of stars in terms of light year or parsec rather than in km?

Answer:-

A parsec is 206, 265 AU and is roughly the distance to the nearest stars. If we were to view a giant star with a diameter of 1 AU at a distance of one parsec, it would appear to be just 1/3600th of a degree in angular size. For comparison, the sun and moon are both half a degree in angular size when viewed from Earth