Space Environmental Protection aims to prevent the introduction of harmful substances or organisms to celestial bodies, such as planets, moons, and asteroids, which could potentially disrupt their natural ecosystems.

Space Junk, Space Debris, and Orbital Debris are all terms used to describe the accumulation of human-made objects in space, such as defunct satellites, rocket parts, and other debris.

The Outer Space Treaty, formally known as the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies, is the primary international treaty governing the activities of states in outer space.

The Kessler Syndrome is a scenario in which the amount of space debris in orbit reaches a critical point, leading to a chain reaction of collisions that generates even more debris, potentially rendering certain orbits unusable.

Space debris originates from various sources, including defunct satellites, rocket boosters, payload shrouds, and other objects left behind during space missions.

Space debris poses several risks, including collision with satellites and spacecraft, damage to ground-based infrastructure, interference with radio communications, and potential harm to astronauts during spacewalks.

NASA's Orbital Debris Program Office is responsible for tracking space debris and assessing the risks it poses to satellites and spacecraft.

Active Debris Removal involves using spacecraft to capture and de-orbit space debris objects.

As of 2023, the United States has the largest number of satellites in orbit, followed by China and Russia.

Asteroid Deflection refers to the intentional modification of an asteroid's orbit to prevent a potential impact with Earth.

The United Nations Office for Outer Space Affairs (UNOOSA) is responsible for coordinating international efforts in space environmental protection.

Space Cleanup, Space Debris Mitigation, and Space Debris Removal are all terms used to describe the process of addressing the issue of space debris.

As of 2023, the United States has the largest amount of space debris in orbit, followed by China and Russia.

Decommissioning, Disposal, and Retirement are all terms used to describe the intentional disposal of satellites and spacecraft at the end of their operational life.

NASA, ESA, JAXA, and other space agencies are responsible for developing and implementing policies for space environmental protection.