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Starlink satellites are falling to Earth at an accelerated pace due to intense solar activity, according to new research from NASA’s Goddard Space Flight Center. 

The study, titled “Tracking reentries of Starlink satellites during the rising phase of Solar Cycle 25,” reveals how powerful solar eruptions and geomagnetic storms are shortening the lifespan of these satellites, which are part of Elon Musk’s SpaceX global internet project.

“Our results indisputably show that satellites reenter faster with higher geomagnetic activity,” the NASA researchers concluded.

How Does the Starlink System Work?

Starlink Company and Elon Musk’s SpaceX

Starlink, a division of Elon Musk’s SpaceX, is designed to provide high-speed internet via a constellation of satellites orbiting Earth. Since its launch, Starlink has grown to over 7,000 satellites, with ambitious plans to expand to 30,000.

These satellites enable broadband service in remote and underserved areas, using partnerships such as with Space Norway to deliver Low Earth Orbit (LEO) connectivity in Europe.

 Starlink aims to become the backbone of next-gen satellite internet services globally. 

How Low-Earth Orbit Works 

Starlink satellites operate in low-Earth orbit, typically under 550 kilometers (342 miles) above the Earth’s surface. This proximity allows for faster data transfer and lower latency compared to traditional geostationary satellites.

However, the trade-off is increased vulnerability to space weather. Geomagnetic storms caused by solar flares heat the Earth’s atmosphere, increasing drag on satellites and pulling them down prematurely.

During these events, satellites orbiting below 300 km have been found to burn up to 10 days earlier than expected.

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Space Weather’s Impact on Starlink Satellites

This phenomenon isn’t new to SpaceX. In February 2022, 49 newly launched Starlink satellites burned up over the Caribbean after being caught in a minor geomagnetic storm.

Most recently, in August 2024, a piece of a Starlink satellite was discovered on a farm in Canada—the first known case of Starlink debris reaching the ground.

NASA’s findings suggest these incidents could become more common during the ongoing solar maximum, the peak of the Sun’s 11-year activity cycle.

While Starlink satellites are designed to burn up harmlessly upon reentry, NASA scientists warn that quicker and uncontrolled descents could increase the risk of space debris reaching Earth. 

With tens of thousands of satellites expected to launch in the coming years, monitoring and mitigating these risks will become even more critical.

For more on the study, see the full report on arXiv.