Question

define-
a) 1parsec
b) 1 astronomical unit​

Answer 1

Answer:

Parsec-

It is the distance at which an arc of a length

of 1AU substended an angel of 1sec at a point.

Astronomical Unit-

It is the average distance between the

centres of sun and earth.

1AU=1.496×10^11m.

Answer 2

Answer:

A parsec is defined as the distance at which one astronomical unit subtends an angel of one arcsecond , which corresponds to 648000π astronomical units. one parsec is equal to about 3.26 light years of 31 trillion kilometres (31x10to the power 12 km)or 19 trillion miles (19x10to the power 12 mi)

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