Dutch Scientists Raise Alarm Over Starlink Satellites’ Impact on Astronomy
Amsterdam, Netherlands – Elon Musk’s latest generation of Starlink satellites, designed to bring fast internet to remote areas worldwide, raises significant concerns among Dutch scientists. Researchers at the Netherlands Institute for Radio Astronomy (ASTRON) warn that these satellites create substantial interference with radio telescopes, potentially jeopardizing critical astronomical research.
Radio telescopes “blinded” by Starlink
According to the ASTRON scientists, thousands of orbiting Starlink satellites are reportedly “blinding” sensitive radio telescopes. These telescopes, which rely on clean radio waves to study the universe, are finding it increasingly difficult to collect data without interference from the satellites.
“With LOFAR (Low-Frequency Array), we have started a program to monitor unintended emissions from satellites belonging to different constellations, and our observations show that the second-generation Starlink satellites emit stronger emissions and do so over a larger range of radio frequencies, compared to the first-generation satellites,” said Cees Bassa, lead researcher at ASTRON.
Broadband vs. astronomy
While Starlink is celebrated for providing broadband internet access in remote and underserved regions, such as Ukraine, Yemen, and rural areas of the UK, scientists argue that this technological benefit comes with significant trade-offs for space research. A 2022 report from the UK’s Department for Digital, Culture, Media, and Sport highlighted Starlink’s ability to deliver internet speeds four times faster than the national average in remote areas.
However, the unintended radio emissions from these satellites are proving to be a serious hindrance for astronomers. The new Starlink satellites emit up to 32 times brighter unintended radio waves compared to earlier models, according to a study by ASTRON. These emissions surpass internationally regulated thresholds for interference, posing a severe threat to research conducted by facilities like LOFAR.
Growing threat to astronomical research
The scale of the issue is striking. “Compared to the faintest astrophysical sources that we observe with LOFAR, UEMR (Unintended Electromagnetic Radiation) from Starlink satellites is 10 million times brighter. This difference is similar to the faintest stars visible to the naked eye and the brightness of the full moon,” Bassa explained.
With SpaceX launching around 40 second-generation Starlink satellites weekly, researchers are increasingly alarmed about the long-term impact on scientific discovery. These satellites are flooding low Earth orbit (LEO), creating what astronomers describe as an intensifying problem for the field of radio astronomy.
Call for action
Experts emphasize the need for immediate action to address this growing issue. Federico Di Vruno from the SKA Observatory highlighted the inflection point humanity is approaching:
“Humanity is clearly approaching an inflexion point where we need to take action to preserve our sky as a window to explore the universe from Earth. Satellite companies are not interested in producing this unintended radiation, so minimising it should also be a priority in their sustainable space policies,” says Federico Di Vruno from the SKA Observatory. “Starlink is not the only big player in LEO, but they have a chance to set the standard here,” he continues.
Seeking collaboration for solutions
The researchers argue that as the consequences of these emissions become more apparent, cooperation between satellite companies, regulatory bodies, and the scientific community is critical. Developing effective mitigation strategies, such as reducing unintended radiation emissions, could help balance the need for global internet access with the importance of maintaining astronomical research.
As the Starlink network continues to grow, the astronomical community is urging responsible space policies that will safeguard the integrity of space science while still advancing technology for the benefit of all.