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An Analysis of the Space Junk Problem and Potential Solutions Environmentalism in the Space Age: An Analysis of the Space Junk Problem and Potential Solutions edited by Paulina Lucio Maymon Source: European Space AgencyApril Greene Apking, in the Journal of International Environmental Law and Policy, writes, “[w]e must ensure that our presence [in space] does not defile what remains one of the few accessible pristine areas.” Considering the endless territorial canvas of space, it seems simultaneously idealistic and unrealistic to assume the responsibility of space maintenance and preservation. But the question remains: has humanity overstayed its welcome in space? Our interest in space started after the Soviet Union successfully launched Sputnik I more than 50 years ago, marking the beginning of our use of space for political, military, technological, and scientific endeavors. We have come far since then, having launched hundreds of satellites, space probes, telescopes, moon missions, and planetary landers. Could space provide us with a sustainable future not possible with the resources available exclusively on Earth? Understanding environmentalism, which focuses on the preservation, restoration, and improvement of the natural environment within the present framework, is critical to answering this question. According to Ryder W. Miller, space environmentalism’s goals include the declaration of “celestial bodies [as] pristine wildernesses that need to be protected rather than frontiers to conquer,” prohibition of “terraforming of celestial bodies,” and “safeguarding against the introduction of non-terrestrial life to and from celestial bodies.” My goal in this paper is to explore the severity of the space environmentalism problem and suggest solutions to help clean up and preserve the increasingly cluttered final frontier. Why Space Junk is a Problem NASA has been studying debris hazards to (and caused by) spacecraft for over a decade, and there is a host of international organizations involved with the dense thicket of regulations governing environmental issues in outer space. Of particular concern is debris (more colloquially known as “space junk”): not only meteorites and space dust, but also fragments of satellites that break up in orbit, leaving smaller but vastly more shards of what amounts to orbiting shrapnel. The Scope of the Space Junk Dilemma Venturing into space is inherently risky, and orbital debris is just one of many hazards that a space traveler faces. But the debris hazard is unique in being a product of our environmental negligence. After just forty years in space, we have already seriously polluted the final frontier. Valuable orbits are peppered with debris that threatens the operation of | 1 Environmentalism in the Space Age: An Analysis of the Space Junk Problem and Potential Solutions satellites and the lives of astronauts alike. There is now so much debris in orbit as a result of space activity such as explosions in fuel tanks and batteries, and from the high-velocity impacts between objects, that the aptly coined “space junk” problem is one that has become critical and needs to be addressed immediately. In fact, even tiny paint flecks can damage a spacecraft when traveling at these velocities—a large number of space shuttle windows have been replaced because of damage caused by material that was analyzed and shown to be paint flecks. NASA’s chief scientist for orbital debris, Nicholas Johnson, concluded from this that “the greatest risk to space missions comes from non-trackable debris”. This threat also extends out to the International Space Station (ISS), which has seen its fair share of close calls in recent years. In March of 2012, a chunk of a defunct military communications satellite narrowly missed the ISS by about 7.5 miles. The danger of that collision was so imminent that the crew on board had already prepared to evacuate the Station upon impact. This is a problem that is occurring more frequently, since any debris larger than a baseball poses a potentially catastrophic threat to the ISS; with hundreds of thousands of pieces of small debris flying around in space near the Space Station, the probability of an accident occurring remains terrifyingly high. Even though the ISS has dodged many close shaves thus far, many other space establishments have not been so lucky. As far back as the ’90s, space debris has been causing billions of dollars of damages. In 1996, a French satellite was hit and damaged by debris from a French rocket that had exploded a decade earlier. On February 10, 2009, a defunct Russian communications satellite called Cosmos 2251 collided with and destroyed a functioning U.S. Iridium communications satellite some 500 miles above the Earth. However, the danger of the collision did not stop with the impact. The Cosmos 2251 collision added more than 2,000 pieces of trackable debris to the inventory of space junk. In 2007, China exacerbated the problem when it conducted an anti-satellite weapon test that destroyed a decommissioned weather satellite and created 150,000 additional pieces of orbital debris, many of which were larger than 1 cm across. The longer-term effects of space debris collisions are staggering. Since the beginning of the Space Age, thousands of satellites have been placed in Earth’s orbit by various nations. Because many of these satellites are in orbits that cross one another, there is a finite probability of collisions between them. Satellite collisions produce several fragments, some of which may be capable of fragmenting another satellite upon collision, creating even more fragments. The result over time will be an exponential increase in the number of orbiting objects, creating a belt of debris around the Earth. This snowballing effect is known as the “Kessler Syndrome.” Eventually, these never-ending collisions stand to create a no-go zone for spacecraft within Earth’s low orbit. | 2 Environmentalism in the Space Age: An Analysis of the Space Junk Problem and Potential Solutions What systems have already been put in place to monitor and potentially come up with a solution to the space junk problem? While NASA, for example, has been diligent in its efforts to track debris in space, surveillance is not sufficient for protecting the environmental gains we have made in outer space. How We Can Save the Last Frontier The answer lies in “remediation”: removing just five large objects per year, for example, could prevent a chain reaction. If governments attempt to clean up this mess themselves, the cost could run into the trillions. Intergovernmental organizations and space agencies alike are discussing the merits of active removal, which would see new spacecraft launched specifically to take other, redundant satellites out of orbit. Other options being discussed include the use of nets, harpoons, tethers, ion thrusters and lasers, all of which would be costly to build and tedious to implement. Even so, the international community needs to sort through the myriad legal issues that would currently frustrate attempts to clean up space. At the moment, international law permits only the launching nation or agency to come into contact with a specific object in orbit, something that would prevent, for example, commercial debris-removal activities. The framework for this international law began with the Outer Space Treaty, which was established in 1967. The treaty involves 96 state parties that are working to “limit activities on the Moon and other celestial bodies exclusively to those for peaceful purposes and forbids the development of military bases, installations, fortifications or weapons testing of any kind on any celestial body.” Therefore, it would be beneficial for a large international agency such as the United Nations to create an international space union that could coordinate all of the debris-removal activity and create a framework for equitable use of orbits among all countries engaged in space exploration. Another critical weakness in the international law on space debris lies in the fact that existing space law is related to the use of space and not to debris regulation itself. The rules within the Outer Space Treaty are helpful in facilitating boundaries in space use, but they do not directly apply to the space debris issue. Until the legal issues are sorted out, all proposed solutions will remain hypothetical, or at best, limited to a small number of debris pieces. In the meantime, the threat continues to grow. Government regulations covering orbital debris are still rudimentary. For now, the federal agencies that have authority over commercial launches are waiting to see if the private sector can deal with the problem on its own. Another obstacle involves locating and tracking the debris. Better tracking data would be required to maximize the effectiveness of debris removal. Since much of that data is classified, only a trusted intermediary could get American and Russian defense officials, for | 3 Environmentalism in the Space Age: An Analysis of the Space Junk Problem and Potential Solutions example, to work together. Here, too, the largest obstacle is legal. While maritime law encourages the cleanup of abandoned vessels as hazards to navigation, space law discourages debris remediation by failing to recognize debris as abandoned property, and making it difficult to transfer ownership of, and liability for, objects in space–even junk. By adapting maritime precedents, space law could make orbital debris removal feasible, once the right economic incentives are in place. The first commitment to going beyond evaluating theoretical approaches has come from the Swiss research institute École Polytechnique Fédérale de Lausanne. In 2012, its scientists came up with the idea for something called CleanSpace One, a one-off spacecraft with grabbing capabilities that they intend to test by guiding it to recover one of the institute’s own satellites. The design is inspired by the way sea anemones wrap their tentacles around their prey; it will have a folding conical net that will grab onto and gulp in space garbage.
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