Space debris in Earth’s orbit
Reflect Orbital’s plan is to use giant mirrors to reflect sunlight back to Earth at night to increase energy production. However, critics point to space debris and circadian rhythm disruptions as negative points to take into account.
A California startup is proposing a bold and controversial idea: put giant mirrors into orbit to reflect sunlight back to Earth after sunset. The company, Reflect Orbital, hopes the technology can extend daylight hours, potentially boosting renewable energy production and providing lighting during emergencies.
Based in Hawthorne, California, Reflect Orbital is developing satellites equipped with large reflective surfaces designed to direct sunlight to specific areas of the planet during the night.
According to the company, the concept could help solar plants continue to generate energy after sunset, directing reflected sunlight towards their panels. The technology could also be used to illuminate disaster zones or provide temporary lighting for cities and infrastructure.
The first step is launch a prototype satellite with a mirror about 18 meters in diameter. Pending regulatory approval, the test spacecraft could enter orbit as early as this summer. From an altitude of approximately 640 kilometers, the satellite would reflect sunlight into a circular area of about five kilometers in diameter on Earth. Observers on the ground would see a bright spot in the sky, with a brightness comparable to that of the full moon.
Reflect Orbital’s long-term ambitions are much broader. If the prototype is successful, the company plans to send around 1000 satellites by 2028 and increase this number to 5000 by 2030. Ultimately, their vision involves a constellation of up to 50,000 mirror satellites by 2035. Some of the later satellites could carry mirrors up to 55 meters in diameter.
The startup aims to sell this reflected sunlight as a service, offering “sunlight on demand” from about 5000 dollars per hour to customers such as energy suppliers or emergency response teams.
Reflect Orbital believes that extending hours of sunlight could increase solar energy production and reduce dependence on fossil fuels, says the .
However, the proposal has generated skepticism among scientists and astronomers. One of the main concerns is the growing congestion in Earth’s orbitwhich already contains thousands of satellites and significant amounts of space junk. Critics warn that launching tens of thousands of additional satellites could increase the risk of collisions, potentially triggering a chain reaction that would create even more dangerous space debris and could destroy critical satellites.
Environmental experts have also raised ecological concerns. Artificial lighting at night may disrupt natural circadian rhythms in humans and animalsinterfering with migratory patterns and affecting plant life that depends on the natural cycles of day and night.
While the concept offers potential benefits, experts say significant research and impact assessments will be needed before large-scale implementation.
