1. What are Sun spots?

2. The orbits of planets around the Sun, or of satellites around the Earth, can be :

3. Stars which appear single to the naked eye but are double stars when observed by a

4. A blackhole is a

5. To a space traveller on moon, the lunar sky during day time appears:

6. Asteroids have their orbits between the planets:

7. The brightest star in the sky is:

8. The distance between the Earth and the Sun (in million kms.) is :

9. Halley’s comet appears once in a period of:

10. Which one of the following is correct? Great Bear is a :