There is no free oxygen in space, so they need to carry oxygen with them to allow their fuel to burn and, in the case of manned spacecraft, for the crew to breathe.
Liquid Oxygen and Liquid Hydrogen are used as rocket fuel as it is the most effecient way to thrust rockets into space, Liquid Nitrogen is not transported into space.
No, in the rockets that NASA uses to launch vehicles into space they use liquid oxygen, as well as liquid hydrogen as rocket fuel.
It is used as oxidant in the rockets.
There is no oxygen in space. The oxygen in space stations is created through a process called electrolysis, which uses energy from solar panels to split water (H2O) into hydrogen gas (H2) and oxygen gas (O2).
Fire needs oxygen in order to burn, and there is no oxygen in space, so rockets must take oxygen with them.
because in outer space there is no oxygen
There is no atmosphere or oxygen in space, therefore rockets provide thrust by burning fuel with oxygen on board, or an solid that produces oxygen as needed.
Oxygen and hydrogen
Oxygen, and sometimes hydrogen as well.
There is no oxygen in space, so spacecraft must carry oxygen with which to burn their fuel and, if they are manned, to allow the crew to breathe.
oxygen
so the people can breath
There is no free oxygen in space, so they need to carry oxygen with them to allow their fuel to burn and, in the case of manned spacecraft, for the crew to breathe.
In space there is no oxygen. Space is a vacuum. All things like a rocket going to space, require a fuel to burn, oxygen and a heater. Since there is no oxygen is space they need to provide it for them. Meaning the reaction can take place correctly.
Rockets designed for space travel use oxygen as part of their fuel systems because the oxygen aids the combustion by acting as an electron acceptor. Liquid oxygen may also be used in rocket fuel sometimes.
So that the astronauts on board can breath, of course. :)