Question

The parallax angle of planet from
2 places of earth is 20 sec. If 2 places are situated diametrically
on the equator, find the distance of planet

from earth.
radius earth = 6400 km​

Answer 1

r

=

I

θ

=

1.28

×

10

7

π

/

30

×

180

=

2.2

×

10

10

m