Space Mirror
Companies & Programmes
One active commercial programme exists in 2026. The others are historical experiments, discontinued proposals, and government research. This page documents every organisation with a verifiable record in space mirror technology — no vapourware included.
Currently in Development
Reflect Orbital is the only active commercial space mirror company as of 2026. Its Eärendil-1 mission is a single-satellite demonstrator targeting solar energy augmentation — reflecting sunlight to ground solar farms during the minutes before sunrise and after sunset. The company has filed with the FCC for satellite licensing and has received AFRL/AFWERX SBIR funding for military orbital illumination research. Ben Nowack, the founder, has been the primary public voice for the company and the technology's commercial case. The proposed full constellation is approximately 57 satellites, but Eärendil-1 is the Phase 1 demonstration. See our Reflect Orbital page and Eärendil-1 mission page for current status and the launch date tracker for schedule updates.
Organisations That Built and Flew Hardware
Rocket and Space Corporation Energia, the manufacturer of the Mir space station and Progress cargo spacecraft, developed and flew the Znamya (Знамя) space mirror programme — the only hardware demonstrations of the technology prior to the current era. Znamya 2 (February 1993) deployed a 20-metre aluminised Mylar film mirror from a Progress spacecraft docked to Mir, reflecting a beam approximately 5 km wide across Europe and North America. Znamya 2.5 (February 1999) used a larger 25-metre mirror but failed to deploy when the film snagged on a Progress antenna during unfurling. The programme was not funded for a third attempt following the 1999 failure. See our Znamya History page for the complete technical record.
Announced but Not Built
In 2018, Chinese state media reported that a research organisation affiliated with the China Aerospace Science and Technology Corporation (CASC) had proposed an "artificial moon" satellite for the city of Chengdu. The proposal envisioned a reflective satellite capable of illuminating an 80-km diameter area to approximately 8 times the brightness of the full Moon — claims that attracted significant international scepticism, as they implied performance substantially beyond what orbital physics allows for a practically sized mirror. The proposal received heavy media coverage but no hardware programme, budget allocation, or launch schedule was publicly confirmed. As of 2026, no Chinese space mirror programme has been announced with verifiable programme details. See our Chengdu page for the detailed analysis of the 2018 claims.
Non-Commercial Programmes with Verifiable Records
The Air Force Research Laboratory, via its AFWERX innovation programme, has funded small-business research into orbital illumination for defence applications. The primary recipient of this funding in the space mirror category is Reflect Orbital. AFWERX SBIR awards are publicly disclosed on SBIR.gov. The Air Force's interest reflects the operational value of on-demand illumination for planned military operations — an application distinct from the civilian solar energy commercial case. See our Military Orbital Illumination page for the defence application context.
James Early of Lawrence Livermore National Laboratory published the foundational paper on orbital solar shading for climate engineering in the Journal of the British Interplanetary Society in 1989. His proposal for a 2,000-km diameter refracting disc at the Earth-Sun L1 Lagrange point is the origin document of the orbital parasol concept in climate science. LLNL is a US Department of Energy national laboratory and does not operate a space mirror programme; Early's paper is a theoretical study. See our Space Mirrors and Climate page for the full context.
NASA conducted a major Space Solar Power (SSP) study from 1976 to 1980 under the Department of Energy's direction, resulting in the "SPS Reference System" report (1979). This study included solar mirror concepts as potential components of larger SBSP architectures — large orbital reflectors directing additional sunlight onto photovoltaic satellite arrays. The study concluded that SSP was technically feasible but economically marginal at 1980s launch costs. Several follow-on studies examined mirror components specifically. None resulted in hardware programmes, and the studies concern SBSP architecture rather than standalone illumination mirrors. The distinction between SBSP mirror components and independent illumination mirrors is covered on our Space Solar Power vs. Mirrors page.
Why There Is Only One Active Commercial Player
The commercial space mirror sector is, as of 2026, effectively a single-company category. This reflects the combination of a technically plausible but commercially unproven business case, significant regulatory uncertainty, and the general difficulty of raising capital for hardware that has never demonstrated commercial revenue.
Reflect Orbital occupies first-mover position in a category it largely defines. If Eärendil-1 demonstrates commercially useful energy delivery — measurable additional kilowatt-hours to a solar farm per pass, at a cost per kWh competitive with peak electricity pricing — it creates the evidence base that would attract capital for a full constellation and potentially attract competitors. If it fails to demonstrate the energy delivery case, or encounters regulatory obstacles that delay the programme, the category may remain a single-company space for years longer.
The history documented on this site — from Tsiolkovsky in 1923 through Znamya in 1993 to the Chengdu proposal in 2018 — suggests the idea resurfaces whenever the enabling technology moves close enough to make it plausible. The current moment is the first time in the technology's history that a commercially viable path has been credibly articulated and funded, with an actual satellite proceeding through regulatory review. Whether that translates into a multi-company industry depends on the outcome of Eärendil-1.
This page will be updated as new entrants emerge with verifiable programme details. For the full historical record, see the Timeline and Mission Comparison.