1. Vocabulary unit 11

2. carry out sth: do and complete a task .

3. Exist : if sth exists, it is present in the real world.

4. universe: the whole of space and everything in it, including the planets and stars.

5. satellite: an object that moves round a bigger object in space.

6. circle sth: go round sth in a circle.

7. Gain sth : get more and more of sth useful, such as knowledge or experience.

8. Reach sth: arrive at a place.

9. Space : the area beyond the earth round the plants and stars.

10. Far-fetched : not easy to believe because it is very improbable