For the first time in history, one company's commercial infrastructure has altered the night sky for the entire planet—without permission from the scientific community and without veto power.
January 2020. The Cerro Tololo Observatory in the Chilean Andes publishes an image: a bright light trail stretches across the star field, like a scratch on film. This is not a meteor and not an airplane—it's 19 Starlink satellites flying in formation at an altitude of 550 kilometers. Astronomers immediately understood: if SpaceX puts the planned 12,000 devices of just the first phase into orbit, ground-based optical astronomy will be at risk.
By August 2024, more than 5,400 Starlink satellites are already operating in orbit, plus nearly 650 OneWeb devices and the first Amazon Kuiper prototypes. The European Southern Observatory reports: up to 30% of images from the largest telescopes are contaminated with satellite tracks. The problem has stopped being hypothetical—it's become statistics. Every night, hundreds of glowing dots sweep over the VLT, Gemini, and Subaru telescopes, and their numbers are growing exponentially. According to the plans of SpaceX, OneWeb, Kuiper, and Chinese constellations Guowang, Qianfan, and Honghu-3, by the end of the 2020s up to 65,000 satellites will be operating in low orbit. For comparison: throughout the entire history of spaceflight from 1957 to 2019, humanity launched about 8,500 devices.
The Vera C. Rubin Observatory (formerly LSST) in Chile—a wide-field telescope with an 8.4-meter mirror and a field of view of 9.6 square degrees—was supposed to become a machine for searching for dark matter, transiting exoplanets, and dangerous asteroids. Instead, it risks turning into a collector of satellite artifacts. Simulations based on BRDF models (bidirectional reflectance distribution function), conducted by Yao Lu and Tony Tyson, show: under current deployment plans, from 66.68% to 92.45% of satellite tracks in Rubin's observation schedule will exceed the crosstalk correctable limit, corresponding to 17.89 stellar magnitude in the g-band for 15-second exposures. This means the tracks will be so bright that software processing won't be able to remove them without losing scientific data. Wide-field astronomy, which studies faint transients and large structures of the Universe, may become technically impossible.
A satellite at an altitude of 550 km moves at a speed of about 7.5 km/s. During a 15-second exposure, it covers 112 kilometers and leaves a streak hundreds of pixels long on the image. The problem isn't that the streak covers objects—programs can subtract tracks. The problem is scattered light and crosstalk between pixels of the CCD matrix.
When a bright satellite crosses the frame, its light creates a halo around the track—like glare from oncoming headlights blurs everything around it. This halo masks faint objects within a radius of several arcseconds. For Rubin, which must find asteroids with a brightness of 24–25 stellar magnitudes, this is critical. Yao Lu showed: 69.33% of visible satellites have a brightness brighter than 7 stellar magnitude—that's a million times brighter than the telescope's scientific targets. Even if you remove the track itself, the noise from scattering remains.
Another problem is pixel saturation. When the photon flux exceeds the pixel's capacity, the charge "overflows" to adjacent cells, creating cross-shaped artifacts (blooming). The limit of 17.89 mag for 15-second exposures is the boundary beyond which crosstalk becomes uncorrectable. According to LSST simulations, most modern Starlink satellites exceed this threshold, even with darkened coating. You can reduce the exposure to 5 seconds, but then the telescope loses the ability to see faint objects—and that's Rubin's main task. Roughly speaking, astronomers face a choice: either see faint galaxies through satellite streaks, or not see them at all.
June 2020. SpaceX launches its first experimental satellite, DarkSat, with a blackened body. The idea is simple: if you paint aluminum panels with black paint, reflectivity will drop. Measurements showed: brightness decreased from 5.6 to 7.5 stellar magnitude—six times fainter. Sounds good, but for astronomers this is still too bright. 7.5 mag—that's the level of Titan, Saturn's moon, which is visible in an amateur telescope. Scientists' goal is 10 mag or fainter, so the satellite doesn't stand out among background stars.
The next iteration is VisorSat. Instead of blackening the body, SpaceX engineers installed a folding visor that shields the solar panels from ground observers during passes above the horizon. The visor works like a car sun visor: it doesn't prevent panels from collecting energy, but blocks reflected sunlight toward Earth. Result: brightness dropped to 6.8–7.2 mag, which still doesn't reach the target threshold. The problem is that even with the visor, the satellite remains visible at twilight—when the Sun has already set for the ground observer but still illuminates the satellite at an altitude of 550 km. This is the golden hour for astronomers—and the worst time for satellite pollution.
2022–2023. SpaceX tests dielectric mirror films—a material that reflects light only in a narrow spectral range (predominantly infrared), transmitting the rest. The physics here is similar to window glass with low-emissivity coating: it transmits visible light but reflects heat. For a satellite, this means: sunlight in the visible range is scattered, not reflected specularly. Initial tests showed a brightness reduction of 20–30%, but mass implementation slowed—the films are expensive, complicate production, and require changes to solar panel design. SpaceX continues launching satellites with basic VisorSat rather than advanced coatings.
In parallel, the company experiments with orientation maneuvers: satellites rotate their solar panels edge-on to Earth during critical astronomical observations. This reduces the area of the reflecting surface but requires coordination with observatories and fuel consumption. In practice, such maneuvers are performed rarely—SpaceX has no obligation to coordinate launch schedules or orbital maneuvers with astronomical organizations. The company does this voluntarily, upon request, but not systematically. No international enforcement mechanism exists.
The UN Committee on the Peaceful Uses of Outer Space (COPUOS) and the International Astronomical Union (IAU) have been trying since 2019 to develop brightness standards for satellites. The IAU Centre for the Protection of the Dark and Quiet Sky from Satellite Constellation Interference (CPS) initiative proposed a limit of 7 stellar magnitudes as a compromise between commercial interests and scientific needs. But this is a recommendation, not law.
The problem is that space law is built on the principle of freedom to use space. The 1967 Treaty prohibits militarization but doesn't regulate commercial constellations. The FCC (Federal Communications Commission) issues licenses for frequencies but doesn't assess environmental impact on astronomy. SpaceX received permission for 11,908 Gen1 and Gen2A satellites without an expert assessment of impact on ground observatories. Legally, the company is not obligated to follow IAU recommendations.
Amazon Kuiper plans 3,236 satellites, OneWeb has already deployed 650 and can scale the constellation to 6,372. China is deploying three mega-constellations—Guowang (13,000 satellites), Qianfan (14,000), and Honghu-3 (10,000)—without participating in international consultations. The cumulative profit from low-orbit internet is estimated at tens of billions of dollars by the end of the decade. Economics is incompatible with voluntary restrictions: each satellite costs about $250,000, each darkened kilogram means additional R&D expenses, each orientation maneuver means fuel consumption and reduced service life. Companies compete for the market, not for astronomers' approval.
The European Space Agency (ESA) and IAU are negotiating with operators, but without an enforcement mechanism this is gesture diplomacy. SpaceX publishes data on satellite orbits so observatories can plan observations in windows between passes, but for wide-field telescopes like Rubin this is not a solution—their field of view is so large that a satellite is almost always in frame. According to Tony Tyson's calculations, with 25,000 satellites in orbit (a conservative estimate for the mid-2020s), every Rubin exposure will contain at least one track, and at twilight—five or more.
Starlink positions itself as an internet democratizer: rural Montana, Alaska, remote African villages get broadband access without laying cables. By early 2024, Starlink serves more than 2 million subscribers in 60 countries, including disaster zones and military conflicts (communications for Ukraine after the Russian invasion). This is real infrastructure that saves lives and connects isolated communities.
But the same technology physically blinds the instruments with which humanity studies dark energy, searches for potentially hazardous asteroids, and observes exoplanet transits. Vera C. Rubin was supposed to conduct the Legacy Survey of Space and Time (LSST)—a decade-long survey of 18,000 square degrees of sky that will collect data on 20 billion galaxies and 6 million asteroids. This data is critical for understanding the accelerated expansion of the Universe, the nature of dark matter, and the probability of Earth colliding with near-Earth objects. But if satellite tracks cover a significant portion of frames, the project will lose statistical power. Some transients—supernova flashes, gravitationally lensed quasars—appear once a decade in a specific point in the sky. If that point ends up under a satellite track, the data is lost forever.
The scientific community proposed compromises: raise the orbit above 1,000 km (where satellites are less frequently illuminated by the Sun), use directional antennas instead of omnidirectional ones (to reduce constellation density), create "astronomically quiet zones" above observatories. SpaceX partially addressed concerns: Gen2 satellites use E-band (71–86 GHz) with narrower beams, which theoretically allows reducing the number of devices. But constellation growth plans compensate for these improvements. Gen2A (the current phase) provides for 29,988 satellites, and that's just SpaceX. Add three American constellations and three Chinese ones—you get about 60,000 devices. Even if each of them is twice as dim as current ones, the cumulative impact will grow by an order of magnitude.
For the first time, a private company has changed a publicly accessible resource—the night sky—without global consent. Before SpaceX, international disputes concerned radio frequencies, space debris, orbital militarization. Now the conflict is between the right to connectivity and the right to observe the Universe. Both sides appeal to the common good, but the criteria are incommensurable: some measure benefit in gigabits per square kilometer, others in photons per square arcsecond.
IAU CPS organizes working groups with operators, but the union has no authority to block launches. The FCC considers economic and technical criteria, but not astronomical ones. The 1967 Outer Space Treaty requires that activities in space be conducted "in the interests of all countries," but doesn't define a mechanism for resolving conflicts between commercial and scientific interests. COPUOS can adopt a resolution, but it won't be binding on the US, China, or private companies.
Astronomers are trying to adapt: developing track subtraction algorithms, coordinating observations with satellite ephemerides, transitioning to infrared range (where satellites are less visible). But adaptation is an admission of defeat. If the sky becomes striped, no software processing will return the lost photons from an exoplanet transit obscured by a Starlink satellite. The question is not whether it's possible to work in the new conditions, but who gave one company the right to set these conditions for the entire planet. The answer has not yet been found, and the orbit continues to fill up.