Uncontrolled Satellite to Re-Enter Earth’s Atmosphere: European Space Agency
A satellite the size of an adult male rhinoceros is expected to make an uncontrolled return through Earth’s atmosphere on Wednesday, according to the European Space Agency (ESA). The satellite, known as ERS-2, could re-enter the atmosphere about 15 hours earlier or later than predicted, making it difficult to pinpoint the exact time and location of its descent.
ERS-2’s batteries have been depleted, and its communication antenna and onboard electronics have been switched off, rendering it impossible to actively control the satellite’s motion during its descent. The ESA made the decision to deplete the satellite’s fuel back in 2011 to minimize the risk of a catastrophic explosion that could generate a significant amount of space debris.
While most of the satellite is expected to burn up upon re-entry, some fragments are likely to fall into the ocean. The ESA assures that none of these fragments will contain any toxic or radioactive substances. In fact, the agency emphasizes that the annual risk of a person being injured by space debris is incredibly low, estimated to be under 1 in 100 billion. This risk is 65,000 times lower than the risk of being struck by lightning.
ERS-2 was launched on April 21, 1995, with the purpose of collecting data on Earth’s land surfaces, oceans, and polar caps. It played a crucial role in monitoring natural disasters such as severe flooding and earthquakes. However, its mission came to an end in 2011 when the ESA initiated the deorbiting process. This process helps prevent collisions in orbit and reduces the creation of space debris.
During the deorbiting process, ERS-2’s remaining fuel was used up, and its average altitude was lowered to ensure a safe re-entry into Earth’s atmosphere within the next 15 years. Now, as the satellite prepares for its final descent, scientists and space enthusiasts are eagerly awaiting its return.
The re-entry of ERS-2 serves as a reminder of the challenges and risks associated with space exploration. While the ESA has taken precautions to minimize the potential dangers, the unpredictable nature of the satellite’s descent highlights the need for continued advancements in space technology and debris management.
As we await the return of ERS-2, it is important to appreciate the significant contributions it has made to our understanding of Earth’s environment. From monitoring natural disasters to studying our planet’s various ecosystems, ERS-2 has played a vital role in advancing scientific knowledge.
In conclusion, the imminent uncontrolled re-entry of ERS-2 is a testament to the complex nature of space exploration. While there may be some uncertainty surrounding its descent, the ESA assures us that the risk to human safety is extremely low. As we bid farewell to ERS-2, let us reflect on its remarkable journey and the invaluable insights it has provided us with over the years.