Astronautics

Astronautics is the science of spaceflight. It covers the fields of space travel and space exploration. It is divided into a number of subfields covering various aspects of spaceflight.

Aeronautics differs from astronautics in that it is the science of atmospheric flight. Aeronautics on Mars can be viewed either as a subset of spaceflight or as an extension of aeronautics.

Astrodynamics

Spacecraft trajectories, ballistics and celestial mechanics.

Orbital mechanics

Spacecraft Propulsion

Propulsion

Propellant

Fuel

Propulsion systems

Secondary propulsion

Spacecraft design

Structure

Power

Thermal design

Communication

Launch and landing infrastructures

Spacecraft controls

Attitude controls

Star trackers

telemetry, command and tracking

Space environment

Solar wind

Radiation