Example image of eyePlorer eyePlorer map for 'Colonization of Mars': Earth Mars Colonization Moon Delta-v Venus Hohmann transfer orbit Nuclear propulsion Spacecraft propulsion Variable Specific Impulse Magnetoplasma Rocket Neighbourhood Solar time Timekeeping on Mars Axial tilt Season Cygnus (constellation) Ursa Minor Aerobraking Cosmic ray Earth's atmosphere Sunlight European Space Agency Mars Exploration Rover Mars Express NASA Phoenix (spacecraft) Water Chemical element Surface gravity Celsius Extremes on Earth Sun Orbital eccentricity Armstrong Limit Pressure vessel Terraforming of Mars Carbon dioxide Partial pressure Magnetosphere Solar wind Cryogenics Mercury (planet) High-altitude balloon Antarctic Earth's magnetic field Ionizing radiation 2001 Mars Odyssey Mars Radiation Environment Experiment International Space Station Gray (unit)