Space exploration 2aTH

a person whose job involves travelling and working in a spacecraft

to travel to or around an area or a country in order to learn about it

the outside or top layer of something

to continue to live or exist

the mixture of gases that surrounds the earth

the force that attracts objects in space towards each other, and that on the earth pulls them towards the centre of the planet

all the people working on a ship, plane, etc.

used when you have done something embarrassing, said something rude by accident, told a secret, etc.

to lift your foot and move it in a particular direction or put it on or in something

the state that something is in