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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesA space mirror does not make light: it reflects sunlight. A spacecraft points the reflective surface so the beam falls on a chosen area, while its orbit changes where that beam travels over time. The idea is different from a space telescope mirror, which gathers and focuses faint light for an instrument.
How does a space mirror work?
Sunlight strikes the reflective surface and bounces away according to the ordinary law of reflection: the angle at which light leaves the mirror equals the angle at which it arrives. The spacecraft controls the mirror’s orientation by changing its attitude. Pointing determines the beam’s direction; the spacecraft’s position and motion determine where the reflected patch reaches Earth and how it moves.
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The mirror redirects sunlight rather than generating it. Its effect depends on the reflector’s size and shape, its distance from Earth, its pointing accuracy, the Sun’s position, and how broadly the reflected light spreads. Atmospheric scattering also affects what people on the ground see. A mirror cannot focus sunlight into an arbitrarily small or bright spot.
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Why orbit matters
A satellite in low Earth orbit moves quickly relative to a fixed point on the ground, so a reflected patch would pass over that location rather than remain there. A concept intended to provide longer coverage would need to account for that motion, potentially through multiple spacecraft or a different orbit. NASA Langley’s 1982 feasibility study examined reflectors in geosynchronous orbit, where spacecraft appear relatively fixed over a region of Earth.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
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What could an Earth-illumination reflector do?
NASA Langley’s September 1982 study estimated that 16 spacecraft, each with a 1-kilometer-diameter reflector in geosynchronous orbit, could illuminate a region 333 kilometers in diameter at 8 lux. The report also considered serving one region through the night or providing morning and evening illumination to several regions. These were estimates and proposed capabilities in a feasibility study, not measurements from an operating reflector network. NASA Langley Research Center, Solar Power Satellite System Definition Study.
That example illustrates the trade-offs: a larger illuminated area spreads the reflected light over more ground, while coverage duration and location depend on orbital geometry, reflector orientation, and the availability of sunlight. The study’s figures describe its particular 1982 design assumptions; they are not a modern performance guarantee for every space-mirror proposal.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
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Is a space mirror the same as a telescope mirror?
No. Both are reflective surfaces in space, but they serve different optical purposes. An Earth-illumination reflector redirects sunlight toward a surface. A telescope primary mirror gathers light from distant objects and focuses it onto an instrument. NASA defines a telescope’s aperture as “the size of the telescope’s primary mirror, the surface that collects and focuses incoming light.” NASA’s Webb mirror explainer describes the James Webb Space Telescope’s 6.5-meter aperture in this imaging role; that measurement is not an illumination-spot size.
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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →| Concept | Purpose and design | Status described by the cited source |
|---|---|---|
| Earth-illumination reflector | Redirects sunlight toward a selected region on Earth; NASA’s historical study considered an unfurlable reflector. | NASA Langley feasibility study published in 1982; the report does not establish that its proposed constellation was built. NASA Langley study. |
| Telescope primary mirror | Collects and focuses astronomical light onto instruments; Webb has a 6.5-meter aperture. | Operating observatory hardware described by NASA. NASA Webb mirrors. |
| Fluidic telescope mirror | Research concept for making very large telescope mirrors in orbit; NASA describes an approximately 50-meter aperture under the current concept. | Concept, not a built telescope. NASA’s Fluidic Telescope explainer. |
| Deformable telescope mirror | Adjusts an optical surface to correct small wavefront errors as a telescope heats and cools in orbit. | Optical-correction approach, not a solar reflector. NASA’s Webb technology explainer. |
| Orbiting Rainbows | NASA/JPL concept uses laser pressure to manipulate particles into an optical surface. | JPL reported a controlled laboratory imaging experiment; the concept had not been demonstrated in space at the time of that article. NASA/JPL’s Orbiting Rainbows article. |
| TransFormers | Foldable mirror structures proposed to redirect solar energy into lunar craters or caves. | Lunar exploration concept, not an Earth-orbit illumination network. NASA/JPL’s TransFormers article. |
What has been proposed recently?
As described in Space.com reports from July and August 2026, Reflect Orbital’s Eärendil-1 was a planned demonstration, with a reported target flight later in 2026. The July report described its planned reflector as 60 by 60 feet (18 by 18 meters). Those are reported plans, not evidence that the spacecraft has flown. The reports also describe company fleet ambitions as proposals, not an operating constellation. Space.com’s July 2026 report.
Rank #3
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The August 2026 report discussed a modeled estimate that a larger proposed operational reflector could appear 40 times brighter than the full Moon at the center of its beam. That is a model-based claim reported by Space.com, not an observed result from Eärendil-1. The same coverage recounts concerns about possible effects on sky brightness, astronomy, and wildlife; the cited estimate should not be treated as a measured environmental impact. Space.com’s August 2026 report.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
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Rank #4
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