Correct the mistakes if any, in the following statements:

i) Astronomical unit is the mean distance of the surface of the sun from the surface of the earth.

ii) Light year is the distance travelled by light in one year in vacuum at a speed of 3x10⁸m per minute.

One light year is equal to _________.

i) 365.25 x 24 x 60 x 60 x 3 x 10⁸ m

ii) 1x 24 x 60 x 60 x 3 x 10⁸ m

iii) 360 x 24 x 60 x 60 x 3 x 10⁸ m

One astronomical unit is the mean distance between the centre of the Earth and centre of the _________ i) Moon ii) Sun iii) Mars

Match the items in group A with the items in group B:

Fill in the blanks:

The special methods adopted to determine very large distances are _________and (Laser pulse method, Light year method, Radio echo method, Astronomical method)