SPACE DEBRIS

PRERNA FOR IAS

SPACE DEBRIS

1. Space Debris

Space debris, also known as space junk or orbital debris, refers to artificial objects in space that no longer serve any useful purpose but continue to orbit Earth. These objects include inactive satellites, discarded rocket stages, fragments from collisions, and equipment lost during missions. Space debris travels at extremely high speeds, making even small pieces dangerous. As space activities increase, the amount of debris also grows, creating challenges for satellite operations and future space exploration. Scientists and space agencies continuously monitor debris to reduce collision risks and protect valuable spacecraft, astronauts, and communication systems that modern society depends upon.

2. Defunct Satellites

Defunct satellites are satellites that have reached the end of their operational life and no longer function. They remain in orbit because there is no atmosphere in most orbital regions to slow them down quickly. These inactive satellites contribute significantly to space debris and pose collision risks to active satellites and spacecraft. Many older communication, weather, navigation, and research satellites fall into this category. If a defunct satellite collides with another object, it can generate thousands of additional fragments. Space agencies now design satellites with disposal plans to safely deorbit them or move them to graveyard orbits after retirement.

3. Rocket Parts

Rocket parts are among the largest sources of space debris. During a launch, rockets discard stages, fuel tanks, protective covers, and other components once they have completed their purpose. Many of these objects remain in orbit for years or even decades. While some eventually re-enter Earth's atmosphere and burn up, others continue circling the planet. Large rocket remnants can collide with satellites and create dangerous debris clouds. Modern space programs are developing technologies to reduce leftover rocket material in orbit. Responsible mission planning and improved rocket designs are helping minimize the amount of space junk generated during future launches.

4. Collision Fragments

Collision fragments are pieces created when satellites, rockets, or other space objects collide. Because orbital objects travel at speeds exceeding 25,000 kilometers per hour, even a small collision can produce thousands of fragments. These fragments spread across orbital paths and significantly increase the risk of further impacts. One major concern is that each collision can generate more debris, leading to a chain reaction. Collision fragments are difficult to track because many are extremely small. Despite their size, they can still damage spacecraft and satellites. Monitoring and preventing collisions is therefore a major priority for space agencies worldwide.

5. Mission-Related Objects