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Space Mirror: The FCC Just Approved a Sun-Reflecting Satellite, and Astronomers Are Unimpressed

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When humans mess with the sun in science fiction, it's usually when a supervillain covers it up and imposes permanent darkness. A space tech company called Reflect Orbital wants to do the opposite: bring sunlight to the dark side of Earth with satellites equipped with giant mirrors. The FCC approved a single satellite as a test demonstration on Thursday, and some scientists are already unhappy about it.

The approval green-lights Reflect Orbital to send its Eärendil-1 satellite into orbit. It's a relatively small spacecraft, weighing 142 kilograms (313 pounds).

Housed in its body is a thin-film square mirror measuring 18 meters by 18 meters (about 60 feet by 60 feet). The satellite is scheduled to launch into space on a SpaceX Falcon 9 later in 2026.

Eärendil-1 promises to reflect sunlight onto Earth in a 3-mile circle that can be aimed basically anywhere that doesn't have sunlight. The company has a web tool that shows you what this would look like, and it's wide enough to light up entire neighborhoods, making it appear like daytime when it's actually night.

Earendil-1 is able to reflect sunlight down to a roughly three-mile radius, giving it the capacity to light up an entire neighborhood. Reflect Orbital

Ostensibly, this would be used to power solar panels at night, thus bypassing the one big drawback of solar panels: They can collect power only during the day. According to Reflect Orbital, electricity demand spikes right around sunset, which means power companies have to make the most power when the sun isn't around to help. That increases fossil fuel usage, which is a contributing factor to climate change.

Reflect Orbital says that it wants to deploy 50,000 of these satellites in the event that the tech demonstration proves successful. That would put 16.2 million square meters of mirrors in Low Earth Orbit to light up large portions of the Earth on demand. For now, only the single Eärendil-1 satellite is approved for launch.

Only one satellite is approved for testing right now, but Reflect Orbital wants to put 50,000 of them in orbit someday. Reflect Orbital

Scientists say this could be a disaster

Academics have been opposing the launch of Eärendil-1 since long before its FCC approval. Over 1,800 comments were made during the proposal stage, and most of them were negative.

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