The attraction or pulling force between all objects
gravity
Materials made from several substances
composites
A curved path around and around an object
orbit
A vehicle or craft with two forms of propulsion
hybrid
A very pure, powerful, high-energy type of light energy
laser
Magnetic levitation, using magnetic forces of attraction or repulsion to make an object or vehicle float or levitate
maglev
A rotating shaft with angled fan-shaped blades or rotors
turbine
To alter the environment, in order to make capable of supporting terrestrial life form
terraform
The atmosphere of Earth
Space
A craft or vehicle that lifts its load, such as a satellite or probe
launch vehicle
A small rocky body orbiting the Sun
astroids
A series of seven Soviet manned orbiting space stations
salyut
A object consisting of a nucleus of ice and dust
comet
Indefinite shape and often of considerable size
mass
A heavy silver-white metallic element
mercury