carry out sth:

do and complete a task .

Exist :

if sth exists, it is present in the real

world.

universe:

the whole of space and everything in

it, including the planets and stars.

satellite:

an object that moves round a bigger

object in space.

circle sth:

go round sth in a circle.

Gain sth :

get more and more of sth useful, such

as knowledge or experience.

Reach sth:

arrive at a place.

Space :

the area beyond the earth round the

plants and stars.

Far-fetched :

not easy to believe because it is very

improbable