61) Comets are luminous celestial bodies moving around the ___
(A) Sun
(B) Moon
(C) Earth
(D) Jupiter
62) The natural satellite of the earth is?
(A) Mars
(B) Sun
(C) Moon
(D) Venus
63) Which of the following planet has the smallest diameter?
(A) Mercury
(B) Mars
(C) Pluto
(D) Venus
64) The biggest planet is ___
(A) Venus
(B) Mars
(C) Saturn
(D) Jupiter
65) Which is the hottest planet in our solar system?
(A) Venus
(B) Mars
(C) Mercury
(D) Neptune