Q).Who is the writer of "Swami and Friends"?

Q).Which is the brighest planet as seen from the earth?

Q).The distance between the earth and the sun is greatest during

Q).Who was the first to measure the distnce round the earth?

Q).What percentage of the irregular surface of the Earth is covered with water?
    A).80 %

Q).Which of planets has almost the same mass,size and density as the Earth?.