Starlink Satellites Threaten Ground-Based Telescope Observations

Elon Musk's Starlink satellite constellation poses a significant threat to ground-based astronomical observations, according to the European Southern Observatory (ESO). The intergovernmental agency, which operates some of the world's most powerful space telescopes, has cautioned that the increasing density of satellites in low Earth orbit could have "devastating consequences" for the study of space. These satellites scatter light unpredictably, interfering with the imaging process essential for astronomical research.

The ESO noted in a new report that the number of satellites orbiting Earth has dramatically increased since Starlink began launching its fleet in 2019. As of last month, Starlink, a subsidiary of SpaceX, had approximately 10,400 satellites in orbit. This figure contrasts sharply with the roughly 14,450 satellites launched in all of human history prior to 2022. The ESO's concerns extend to Musk's future plans for a network of one million "orbital data centers."

To mitigate the impact, the ESO is proposing a limit of 100,000 "faint satellites, below naked eye visibility." Researchers from the ESO conducted simulations to assess the potential disruption from a projected surge in Starlink satellites. Their findings indicate that for Europe's Very Large Telescope (VLT) in Chile, the telescope's field of view could be diminished by as much as 28%, even under optimal observing conditions. The ESO's Directorate of Operations, represented by Olivier Hainaut, stated that while they have managed thus far, the situation is worsening.