{"id":520458,"date":"2026-04-08T23:47:15","date_gmt":"2026-04-08T23:47:15","guid":{"rendered":"https:\/\/www.newsbeep.com\/uk\/520458\/"},"modified":"2026-04-08T23:47:15","modified_gmt":"2026-04-08T23:47:15","slug":"this-company-is-launching-4000-orbiting-sky-mirrors-to-beam-sunlight-down-to-earth-after-dark-scientists-want-it-stopped-now","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/uk\/520458\/","title":{"rendered":"This Company Is Launching 4,000 Orbiting \u2018Sky Mirrors\u2019 to Beam Sunlight Down to Earth After Dark. Scientists Want It Stopped Now"},"content":{"rendered":"

A California startup called Reflect Orbital is developing a constellation of space-based mirrors designed to redirect sunlight toward specific locations on Earth after dark, a concept that has drawn serious concern from astronomers and ecologists who say the night sky is already under strain from the satellite boom.<\/p>\n

The company\u2019s early plans describe up to 4,000 satellites operating in low Earth orbit, each carrying a large reflective surface that can tilt and rotate to aim redirected sunlight at a target area on the ground. Future versions of the mirrors could reach roughly 55 meters across. When sunlight strikes the surface, the satellite angles the reflector so a beam of natural light travels downward, even after sunset, toward areas that have already entered nighttime.<\/p>\n

A Demonstration Mission Called E\u00e4rendil-1<\/p>\n

Reflect Orbital\u2019s first test<\/a> will be a smaller spacecraft deploying an 18-by-18-meter square reflector at an altitude of about 600 kilometers. During each orbital pass<\/a>, it would redirect sunlight toward selected locations for several minutes. Ground sensors would measure brightness and coverage to determine whether the system can reliably hit a specific region. The results would guide development of the full constellation.<\/p>\n

The satellites are designed for what the company calls a sun-synchronous orbit, a path that tracks the boundary between Earth\u2019s lit and dark sides, keeping the spacecraft continuously illuminated by the sun even as it passes over regions in nighttime below. Because the reflected beam<\/a> spreads as it travels through the atmosphere, the illuminated patch on the ground would span roughly 5 to 6 kilometers across. Inside that area, the sky would briefly brighten beyond the intensity of a full moon for a few minutes before the satellite moves on.<\/p>\n

\"FutureFuture versions of the mirrors could reach about 55 meters across. When sunlight strikes the reflective surface, the satellite angles the mirror so the light travels toward Earth. Credit: Reflect Orbital<\/p>\n

Reflect Orbital\u2019s own roadmap shows ambitions that extend far beyond a demonstration. The company projects 36 satellites in orbit by 2027, more than 1,000 by 2028, and eventually more than 50,000 by 2035. At full scale, the service would reportedly be capable of delivering up to 36,000 lux for hours, the approximate brightness of outdoor daylight, as well as sustained street-level lighting at 2 lux around the clock.<\/p>\n

What the Company Says the Light Is For<\/p>\n

The company positions reflected sunlight as a clean, infrastructure-free alternative to conventional artificial lighting. Its stated applications include extending solar farm output<\/a> after sunset, illuminating disaster zones and search-and-rescue sites, supporting nighttime industrial operations in remote locations, extending agricultural growing seasons, and replacing conventional streetlights in cities.<\/p>\n

Reflect Orbital\u2019s website describes the service as adjustable from full moon to full noon and says the light can be turned off instantly by rotating the satellite away from Earth. The company also states it will only direct light to locations that have received prior approval from local authorities, and that it maintains exclusion zones around research observatories and protected natural environments.<\/p>\n

Astronomers Already Struggling With Satellite Trails<\/p>\n

The proposal lands at a moment when professional astronomers are raising alarms about the pace of the broader satellite expansion. A peer-reviewed study published in Nature<\/a> in December 2025 by Dr. Alejandro S. Borlaff of NASA Ames Research Center, along with co-authors Pamela M. Marcum and Steve B. Howell, modeled how planned satellite constellations will degrade imagery from both ground-based and space-based telescopes.<\/p>\n

\"Simulated\u00a0Simulated effects of satellite trails in Hubble, SPHEREx, Xuntian and ARRAKIHS. Credit: Credit: NASA \/ Borlaff, Marcum, Howell (Nature, 2025)<\/p>\n

The findings are stark. If all currently proposed constellations are completed, totaling roughly 560,000 satellites, the study projects that one-third of Hubble Space Telescope images will contain at least one satellite trail. Three other space telescopes analyzed in the study, SPHEREx, ARRAKIHS, and China\u2019s Xuntian telescope, would have more than 96 percent of their exposures contaminated. At a hypothetical population of one million satellites, Xuntian would average 165 satellite trails per exposure.<\/p>\n

The study\u2019s authors note that satellites optimized to dim themselves for ground-based observers, as SpaceX has attempted with Starlink, actually increase their cross-section from the perspective of a telescope in orbit, since the solar panels face the sun in a way that maximizes reflectivity toward space-based instruments. Satellites designed specifically to reflect large amounts of light downward would introduce a different order of problem.<\/p>\n

Ecosystems and Orbital Safety Also Raised<\/p>\n

The concerns extend beyond professional astronomy. Researchers who study light pollution have documented how artificial nighttime illumination disrupts the behavior of migratory birds, insects, sea turtles, and other species that depend on natural darkness for navigation, feeding, and reproduction. A constellation of mirror satellites capable of brightening ground areas beyond full-moon levels, across targeted swaths of landscape, would add a new and variable source of artificial nighttime light across ecosystems with no ground-based infrastructure to limit or filter it.<\/p>\n

A separate concern involves orbital congestion. Low Earth orbit already hosts thousands of active satellites alongside a growing population of debris. Each additional spacecraft increases the statistical risk of collision; each collision can generate fragments that threaten other satellites and further restrict access to useful orbital altitudes. Reflect Orbital\u2019s roadmap calls for tens of thousands of satellites by the mid-2030s, which would represent a substantial addition to an already crowded orbital environment.<\/p>\n

As reported by The Daily Galaxy<\/a>, the Nature study\u2019s authors compared the current trajectory of satellite deployment to the early period of industrial chlorofluorocarbon use before the ozone crisis became visible, arguing that the scale of proposed constellations is outpacing scientific understanding of the cumulative effects. They recommended limiting large satellite constellations to orbital altitudes below those used by space telescopes, establishing open archives of precise orbital data for all active and derelict spacecraft, and reducing the reflectivity of satellite surfaces through standardized design requirements.<\/p>\n

Reflect Orbital has not yet announced a confirmed launch date for its E\u00e4rendil-1 demonstration mission, which remains the next concrete milestone for the project.<\/p>\n","protected":false},"excerpt":{"rendered":"A California startup called Reflect Orbital is developing a constellation of space-based mirrors designed to redirect sunlight toward…\n","protected":false},"author":2,"featured_media":520459,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[90,416,56,54,55],"class_list":{"0":"post-520458","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-space","8":"tag-science","9":"tag-space","10":"tag-uk","11":"tag-united-kingdom","12":"tag-unitedkingdom"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts\/520458","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/comments?post=520458"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts\/520458\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/media\/520459"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/media?parent=520458"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/categories?post=520458"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/tags?post=520458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}