The issue of space debris is posing a growing threat to our ability to use outer space, amid fears that the proliferation of junk could render the space environment ‘unusable’. The problem of space junk, also referred to as space debris, relates to defunct man-made objects in space, including old satellites and spent rocket stages, along with the fragments they produce from collisions and degradation. These objects pose a significant risk to both manned and unmanned spacecraft due to their high velocity, with even small pieces capable of causing extensive damage.
The European Space Agency (ESA) estimates that there are presently about 34,000 pieces of debris larger than 10cm in orbit, along with millions of smaller pieces that could still cause significant damage. They orbit the Earth at speeds of up to 28,000 kilometers per hour, making them faster than a speeding bullet and capable of damaging satellites or even the International Space Station (ISS).
To mitigate this risk, entities like NASA and ESA are developing a variety of measures, including better tracking systems, improved collision avoidance maneuvers, and new technologies for removing debris from orbit. Among these initiatives is the ESA’s ClearSpace-1 mission, which aims to launch a “space tow truck” in 2025 to capture and deorbit a piece of space debris.
However, the issue of space debris is not only a technical challenge but also a legal and political one. Currently, there is no international agreement on who is responsible for cleaning up space debris, and the Outer Space Treaty of 1967, which forms the basis of international space law, does not explicitly address the issue of space debris. As the use of space continues to increase, with more countries and private companies launching satellites, there is growing recognition of the need for improved space traffic management and legal frameworks to ensure the long-term sustainability of space activities.
Moreover, the issue of space debris also has implications for our understanding of the long-term effects of human activities on the space environment. Just as pollution on Earth raises concerns about the health of our planet, space debris is a stark reminder of the potential consequences of our activities in space. As such, addressing the issue of space debris is not only about ensuring our ability to continue using space for scientific exploration and commercial activities, but also about our responsibility to preserve the space environment for future generations.
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