A company wants to brighten the night sky by reflecting sunlight onto Earth using mirrors placed in orbit. Not a one-off stunt, but a full system designed to extend daylight after sunset and potentially transform how we think about artificial lighting, energy usage, and global illumination. The aim is simple enough: make solar energy work even when the Sun goes down.
The start-up Reflect Orbital is now waiting on approval from the Federal Communications Commission to test its first satellite, as reported by The New York Times last week. If cleared, it could launch within months and begin demonstrating its ambitious concept. For most people, it just sounds strange or futuristic, or even like fiction.
Reflect Orbital’s space mirror satellites aim to bring sunlight to Earth at night
The company plans to send satellites into orbit, each carrying a large reflective surface.
These are not tiny mirrors. The first test version is expected to unfold into a structure about 60 feet wide. That mirror would bounce sunlight back to Earth, lighting up a circular patch roughly three miles across. From the ground, it might look as bright as a full moon, maybe even a bit more intense depending on conditions.
The long-term vision is far bigger. Thousands of satellites, possibly up to 50,000, are forming a network that can deliver light where it is needed.
Solar farms could keep generating electricity after sunset. Emergency crews might get instant lighting in disaster zones. Cities could even request temporary illumination.
Space mirrors: History and efficiency concerns
Similar concepts have surfaced in the past. Back in the 1990s, a Russian satellite experiment briefly reflected sunlight onto Earth. It worked, though only for a short time and in a limited way. Earlier proposals suggested using mirrors to protect crops from frost or to light remote regions. So the concept itself is not the issue.
Some experts have tried to calculate how effective this system could actually be. One astronomer suggested that even with thousands of mirrors, the light reaching a solar farm would still be far weaker than normal daylight. Not even close to midday levels.
Space mirrors and the growing light pollution issue
There is also the issue of light spreading through the atmosphere. Even if the beam is carefully targeted, some of that light will scatter. That could brighten the surrounding sky more than expected. Thousands of satellites already orbit Earth, including large constellations from companies like SpaceX, led by Elon Musk. These satellites sometimes leave bright streaks in telescope images, making certain observations harder.
Adding mirrors designed to be bright on purpose could make things more complicated. Even one highly reflective satellite might stand out. A full network could change how the night sky looks in noticeable ways.
What about life on earth
Light does more than help us see. It shapes behaviour, sleep cycles, migration patterns, and helps in plant growth. Experts say artificial light at unusual times could confuse animals. Birds might migrate at the wrong time. Insects could behave differently. Plants might bloom when pollinators are not around. But ecosystems tend to react in complex ways. Humans are not immune either. Exposure to light at night can disrupt sleep patterns. That is already a known issue in urban areas. Extending artificial light into new regions could make that effect more widespread.
So while the technology might offer benefits, it also carries risks that are harder to predict.
Legal uncertainty and why the moon might work better
The approval process itself raises some interesting questions. The Federal Communications Commission mainly focuses on communication systems and satellite safety. It does not typically assess environmental impact in space.
There is no clear global framework for projects that could change how the night sky behaves. And this project, if it expands as planned, might do exactly that.
