Because there's no gravity.
Gravity
The process by which a spacecraft is propelled into space.
how is the space shuttle different form other spacecraft
Unmanned - Space probes are a form of robotic spacecraft.
Thrust is the force that propels a rocket or spacecraft and is measured in pounds, kilograms or Newtons.
Aircraft fly through air and spacecraft fly in space.
Because there's no gravity.
Gravity
a space craft
The process by which a spacecraft is propelled into space.
how is the space shuttle different form other spacecraft
Unmanned - Space probes are a form of robotic spacecraft.
It is propelled into space by rockets
The firing of a spacecraft's engine against the direction of motion to cut the spacecraft's orbital speed. The speed reduction places the spacecraft in a lower orbit. If this lower orbit passes through Earth's atmosphere, the spacecraft reenters.
All U.S. spacecraft since Apollo have provided living space and working space.
The Apollo spacecraft.