Orbital Debris Space Debris Near-Earth Objects Lunar Environment Lunar Surface Space Debris Management Asteroid Impact Asteroids Solar Activity Cosmic Radiation Lunar Conditions Asteroid Threats Space Sustainability Martian Environment Radiation Effects Microbial Ecosystems Light Pollution Planetary Bodies Closed Ecosystems Radiation Environments Microbial Ecology Asteroid Impacts Threats to Earth Orbital Debris Mitigation Asteroids and Comets Human Impact on Space Interstellar Space Debris Management Radiation Air Leakage Solar Winds Contaminants in Space Orbital Dynamics Impact of Human Activity Human Impact Space Research Applications Lunar Regolith Impact of Tourism Asteroid Risks Asteroid Hazards Asteroid Characteristics Asteroid Impact Risks Solar Observations Orbital Regimes Celestial Events Chemical Composition Microbial Communities International Space Station Microbial Life in Space Microbial Environment Earth's Orbit Impact Risks Satellites Lunar Geography Microgravity Solar Influence on Earth Orbital Debris Management Lunar Surface Conditions Microgravity Effects Space Debris Mitigation Planetary Atmospheres Planetary Environments Planetary Habitats Mars Environment Lunar Resources Space Junk Low-Earth Orbit Magnetosphere Space Weather Low Earth Orbit Orbital Mechanics