Q. Pole Star is always seen at one point in the sky whereas other stars are not; this is because: [CDS 1993] (Solved)
1. Pole star rotates with the same period as the earth
2. Pole star is a star of our own galaxy
3. Sun and Pole star are in two opposite directions relative to earth
4. Pole star lies in the axis of spin of the earth
- d. Pole star lies in the axis of spin of the earth