1. Which planet of the solar system spins on its axis at the fastest rate?

2. The correct sequence of planets in the descending order of their equatorial diameter is :

3. Which of the following is the largest of the inner planets? [IAS 1990]

4. The outermost layer of Sun is called:

5. In 1610, Galileo Galilei discovered four moons of which planet?

6. In order of their distances from the Sun, which of the following planets lie between

7. Which planet is known as the ‘Watery Planet’ ?

8. Which planet looks reddish in the night sky?

9. Which of the following planets is known as ‘Morning Star’?

10. Pole Star is always seen at one point in the sky whereas other stars are not; this is