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Home Artificial Intelligence

One of SpaceX’s Starlink satellites almost collided with a weather forecasting satellite today

Guest Author by Guest Author
September 2, 2019
in Artificial Intelligence
One of SpaceX’s Starlink satellites almost collided with a weather forecasting satellite today
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This post originally appeared on MIT Technology Review

The European Space Agency had to move one of its satellites out of the way today to protect it from colliding with a SpaceX Starlink satellite, the space agency just announced on Twitter.

A first: ESA says it’s the first time it has had to perform a “collision avoidance maneuver” to stop one of its satellites from crashing into a “mega constellation” satellite. Specifically, it had to fire the Aeolus satellite’s thrusters in order to increase its altitude so it could pass over a SpaceX Starlink satellite.

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Aeolus, a scientific satellite launched in August 2018 to improve weather forecasting, started returning data shortly after the time of the expected collision, showing it had successfully avoided a collision. ESA said it was rare that it has to dodge active satellites: most maneuvers of this sort are to avoid debris. Aeolus orbits considerably lower than the Starlink constellation’s current orbit height so it is possible that the SpaceX satellite it had to dodge was one of the three that SpaceX is de-orbiting after it lost contact with them.

Subtle dig: It’s hard not to interpret the news as a criticism of SpaceX’s plans to launch 12,000 satellites to provide broadband internet connections. Other firms, like Telesat, OneWeb and LeoSat, have similar plans. SpaceX started by launching 60 of the satellites in May 2019, but it plans to rapidly ramp up the numbers in the coming months. 

Space debris: The ESA is far from alone in its concerns. Space debris experts warn that these sorts of “mega constellations” of satellites have the potential to cause far greater and longer-lasting problems than more eye-catching stunts like India’s anti-satellite missile test. It’s currently very rare to have to dodge active satellites, the ESA said, but we can expect to see several hundreds of collision warnings every week before long.

A potential solution: Today’s manual collision avoidance processes simply won’t work in an age of mega-constellations. There will be too many to keep tabs on. As a result, ESA is preparing to automate this process using artificial intelligence systems, which assess potential collisions and move satellites out of the way. Until those are up and running, we’re relying on human observation and intervention. 

Read next: How to fight a war in space (and get away with it)

The Airlock, our space newsletter, is coming back really soon! Get ready by signing up for free here.

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