What's Happening?
A study by Canadian researchers has highlighted the potential risks associated with the increasing number of satellite megaconstellations being launched into Earth's orbit. The study, which examined 11
different megaconstellations, found a 40% collective risk of on-ground casualties if satellites do not completely burn up upon reentry into the Earth's atmosphere. The research, led by Ewan Wright from the University of British Columbia, points out that the scientific understanding of how satellites disintegrate during reentry is not perfect, and some materials used in satellite construction, such as stainless steel and titanium, may not burn up entirely. This could result in debris surviving reentry and posing a risk to people on the ground.
Why It's Important?
The findings of this study are significant as they raise concerns about the safety and environmental impact of the growing number of satellites in orbit. With over 73,000 satellites considered in the study, the potential for debris to cause harm is considerable. This issue is particularly relevant as more companies and countries launch satellites for communication, navigation, and other purposes. The study suggests that current standards and guidelines may not adequately address the cumulative effects of launching and reentering thousands of satellites. This could lead to increased risks of casualties and damage to infrastructure, highlighting the need for improved regulations and safety measures.
What's Next?
The study recommends that states and national regulators require independent verification of claims regarding the complete disintegration of satellites upon reentry. It also suggests evaluating the collective casualty risks from entire constellations and transitioning to a controlled reentry regime that is fair and globally applicable. These steps could help mitigate the risks associated with satellite debris and ensure safer space operations in the future.
