“Twinkle, twinkle, little star, how I wonder what you are / Up above the world so high, like a diamond in the sky.”
But are all the twinkling lights in the night sky truly stars? As time goes on, what will we actually be looking at when we sing this nursery rhyme?
By 2030, experts predict that approximately 50,000 artificial satellites will be orbiting Earth in low Earth orbit (LEO). These satellites are essential for expanding internet access to remote regions.
However, a significant concern is that LEO satellites reflect starlight, and some scientists warn that seeing natural stars in the night sky could become significantly more complex within a decade.
Some may wonder why it matters if we can’t see the stars?
The consequences are severe for astronomers. Astronomical research becomes increasingly difficult when satellites obstruct the night sky, limiting our ability to study Earth’s atmosphere, solar activity, and space environments. This, in turn, could impact our capacity to monitor climate change.
There are also concerns that this interference could disrupt asteroid detection systems and GPS technology, further complicating space exploration and scientific research.
Beyond that, scientists warn of potential disruptions to nocturnal ecosystems, which could have cascading effects on wildlife.
In response to growing concerns, SpaceX has developed DarkSat, a satellite designed to reduce light reflection. However, experts argue this solution alone falls far short of what’s needed.
In 2023, a research team from Germany’s GeoForschungsZentrum (GFZ) analyzed observational data from scientists worldwide and found that approximately 30% of the global population—and 80% of Americans—have already lost the ability to see the Milky Way.
Astronomers worldwide call for governments to proactively ensure sustainable space practices.
Last month, the Korean Astronomical Society issued a statement endorsing the Dark and Quiet Skies (DQS) resolution adopted at last year’s International Astronomical Union (IAU) General Assembly.
The beauty of the night sky must be preserved—for the sake of science, future generations, and the simple wonder of looking up at the stars.