Selling sunlight at night sounds almost like science fiction scribbled in the margins of a physics notebook. However, engineers at Reflect Orbital, which has a small office in California, seem confident that it could grow into a successful company.
On paper, their plan is simple. Send thousands of satellites into low-Earth orbit, each of which will have a reflective panel—basically, a massive mirror. The mirrors would tilt in the direction of the Sun and reflect its light back down to the surface when darkness fell over certain areas of the planet. Long after sunset, a valley, a solar farm, or even a city district might see a brief period of daylight.
| Category | Details |
|---|---|
| Company | Reflect Orbital |
| Concept | Satellites equipped with giant mirrors to reflect sunlight onto Earth at night |
| Proposed Scale | Up to 4,000 orbital mirrors in low-Earth orbit |
| Prototype Satellite | EARENDIL-1 demonstration mission |
| Mirror Size | Approx. 18 × 18 meters (60 × 60 feet) for first test |
| Potential Uses | Powering solar farms at night, disaster illumination, agriculture support |
| Main Critics | Astronomers and environmental researchers |
| Regulatory Approval | License request submitted to the Federal Communications Commission |
| Historical Precedent | Znamya 2 |
| Reference | https://www.livescience.com |
The pitch sounds almost realistic in the company’s early technical presentations. Even after dusk, solar farms could continue to generate electricity. Teams engaged in search and rescue may light up disaster areas. Farmers may extend the time that crops are grown. The promise of “sunlight on demand,” which sounds a little surreal when said out loud, seems to be attracting investors.
It seems especially unsettling for astronomers. Words like “catastrophic,” which scientists typically do not use lightly, have been used by some. Aesthetics is not the only issue. Cities’ light pollution and the increasing number of satellites already pose problems for modern telescopes. The night sky might become much brighter—and much more difficult to study—if thousands of orbiting mirrors were added.
It is easier to visualize the problem when you are standing at an observatory late at night. Photons that have traveled through cosmic history are collected by telescopes that track faint galaxies billions of light-years away. One bright satellite streaking through the field of view has the potential to ruin those sensitive measurements.
Opponents fear that astronomical instruments could be overpowered by even fleeting beams of light sweeping across the sky. After all, for the majority of human history, the sky has consistently remained dark. Uncomfortable questions arise when it becomes a partially illuminated environment. The environmental factor is another, more difficult to measure but equally disturbing.
For the purpose of controlling their migration, reproduction, and hunting habits, many animals depend on true darkness. Moonlight is used by sea turtles to navigate. When they migrate seasonally, birds follow the stars. Ecosystems may be disrupted in unpredictable ways if artificial sunlight is flooded into some parts of the planet.
Even the human body reacts to cycles of light with great force. The daily cycle of daylight and darkness affects hormones, mental health, and sleep patterns. Localized orbital illumination may not be a major issue. However, it’s also possible that the biological effects haven’t been thoroughly investigated.
According to Reflect Orbital, the light would be soft and like a bright moon. For a few minutes at a time, company representatives describe a gentle glow that drifts across landscapes. According to them, the concept is similar to a novel form of renewable infrastructure—space-based daylight augmenting solar energy. Skeptics, however, are still not convinced.
The rate at which Earth’s orbit is already shifting contributes to some of the tension. Approximately 3,000 satellites were in orbit around the earth five years ago. Over 11,000 are present today. The night sky’s appearance has already been changed by mega-constellations from businesses like SpaceX and Amazon, which have left bright streaks on long-exposure telescope photos.
In light of this, the proposal for 4,000 mirrors seems more like a step toward a greater transformation of near-Earth space than a minor experiment.
Here, it’s difficult to ignore the historical resonance. In actuality, the idea of space mirrors has been around for over a century. Hermann Oberth, a German rocket pioneer in the 1920s, had an idea for orbital reflectors that would light cities. When Russia launched the experimental Znamya 2 satellite in the 1990s, the concept reappeared and briefly illuminated parts of Europe with a moving beam of sunlight.
Before the satellite caught fire during re-entry, the experiment was short-lived. Reflect Orbital, on the other hand, has a much more ambitious vision.
The business has already submitted an application to the Federal Communications Commission for regulatory approval in order to launch EARENDIL-1, a demonstration satellite. If authorized, the craft would launch a mirror that is about 60 feet wide, which would be sufficient to test the accuracy of directing sunlight onto an Earthly target.
From there, the plan grows rapidly. Numerous mirrors. continuous coverage. Sunlight was provided in a manner similar to a utility.
It seems like humanity is venturing into uncharted territory as this develops. The cycle of day and night was a fundamental barrier to life on Earth for the majority of recorded history. Technology is now starting to blur that line. It remains to be seen if the world truly desires permanent twilight from space.
