Reflect Orbital tests ground lights near Mount Whitney, draws backlash
A startup aiming to beam sunlight from space at night lit up the Sierra Nevada with a ground-based test, sparking online mockery and concern.
What to know
- Reflect Orbital tested ground-based lights near Mount Whitney to simulate its planned orbital-mirror system for beaming sunlight to Earth at night.
- The company frames the technology as a search-and-rescue aid, but online reaction is dominated by criticism calling the project reckless or pointless.
- A side dispute among commenters concerns whether the startup's energy-math claims hold up, and whether they apply to Earth cooling or an unrelated Mars-warming argument.
The dispute Commenters disagree over whether the cited math about planetary energy change actually supports or undermines the company's claims, and whether it even applies to the right planet. · positions read across 34 posts and comments
The project is a reckless or pointless PR stunt by a hype-driven startup.
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“I fucking hate this company. This is so fucking stupid for so many reasons.”
sundogplanets@mastodon.social · Mastodon ↗
The dispute over the company's energy-math claims is being muddled by conflating Earth cooling with a separate Mars-warming argument.
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“This conversation was about cooling Earth, how'd it suddenly shift to a copy&paste about warming Mars? They're two entirely different animals.”
McKlown · Reddit ↗
Reflect Orbital Startup developing orbital sunlight-reflecting mirrorssundogplanets@mastodon.social Mastodon criticharryseaotter.art Bluesky critic
How it unfolded 5 developments, newest first · click a bar or a number to jump postscomments
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Bluesky user sarcastically questions safety implications
A Bluesky post reacting to the SFGate story sarcastically suggests the project could cause problems, continuing the wave of public skepticism.
“Well, I can totally see why this would totally not cause any problems whatsoever.”
— harryseaotter.art -
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Well, I can totally see why this would totally not cause any problems whatsoever.
2 more of the top 3 · 30 posts in this stretch
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use it to light up an area Let me introduce you to this thing called an infrared camera You could illuminate an enemy base with painful levels of brightness You absolutely could not, even with tens of thousands of these things focused on one point. It'd take literally hundreds of thousands of 10x10m mirrors to achieve daytime levels of brightness…
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and one for @ sundogplanets "On Saturday night, residents of Lone Pine, a small Eastern Sierra town near Mount Whitney, were baffled by a pair of blinding lights illuminating the desert south of town. In what should have been a pitch-black sky, the beams seemed to come out of nowhere, casting a glow across the landscape." https://www…
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Mastodon user condemns the company's test as reckless
A widely engaged Mastodon post calls the company and its stunt stupid, amplifying criticism of the test.
“I fucking hate this company. This is so fucking stupid for so many reasons.”
— sundogplanets@mastodon.social -
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I fucking hate this company. This is so fucking stupid for so many reasons. https://www. sfgate.com/tech/article/mount- whitney-reflect-orbital-22478878.php
1 more of the top 2 · 2 posts in this stretch
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The statement was about napkin math to create planetary energy change. Here is some pretty robust math talking about planetary energy change. Don't think I can make it any simpler than that :)
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Reddit thread disputes the startup's science and motives
Commenters mock the test as a PR stunt reinventing basic illumination, while others argue over whether the company's cited math applies to cooling Earth or a separate claim about warming Mars.
“This conversation was about cooling Earth, how'd it suddenly shift to a copy&paste about warming Mars? They're two entirely different animals.”
— McKlown -
"tech startup" is now code for "dumb solution to a made up problem, with a shitty 3D rendered 'proof of concept' and a lot of techbro nepo babies lining up to waste money on this". Edit: and their "test" was a blatant PR stunt that used spotlights that speculate on the nature of their proposed illumination, to demonstrate how people can do things…
1 more of the top 2 · 2 posts in this stretch
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This conversation was about cooling Earth, how'd it suddenly shift to a copy&paste about warming Mars? They're two entirely different animals.
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SFGate details the test and the startup's orbital-mirror plans
Coverage explains that the California startup is planning satellites with mirrors to reflect sunlight down to Earth, and that the Mount Whitney test used ground equipment to simulate that effect.
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Reflect Orbital runs ground-light test near Mount Whitney
Mysterious lights spotted near Mount Whitney turn out to be a simulated-illumination test by Reflect Orbital, which is developing orbital mirrors meant to beam reflected sunlight to the ground at night, pitched as an aid to search-and-rescue teams.
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first by Mastodon, 28d ago
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What people are saying 17 voices from 2 sites · best of 34 · verbatim
- Oct 27
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I was wondering about the numbers, especially when it comes to the size of the reflector. How big would it have to be to reflect enough light so that the beam would be useful? And at that point, how much force is being exerted on it by the sun? At some point it's going to end up a solar sail.
- Oct 23
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Once the bad actors of the world want world peace, then great we can do it your way. Until then, I'm American and want the US to be the deciding military power in the world. You're crazy if you'd rather have Russia or China have it
- Oct 18
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I am aware that in our current world strength DOES define authority. But that is not the way it SHOULD be. Especially for a region that belongs to nobody and is infinitely big (space)
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What math did you use to reach that hundred meters number? And to what hard physical limit are you referring? I strongly suspect you’re misapplying that.
- Oct 16
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At least Starlink’s megaconstellation actually does something. You could set the money spent on Reflect’s entire company so far on fire and derive more value from it.
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"The company wants to build a network of satellites that reflect sunlight onto specific locations on Earth at night, potentially illuminating everything from city streets to industrial sites." https://www. sfgate.com/tech/article/mount- whitney-reflect-orbital-22478878.php
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IIRC radio astronomy is particularly affected because of some bands satellites communicate on, and it happens even in the middle of the night
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Do you suspect that this process works the same when the big mirror is several hundred miles away and moving at orbital velocity, or do you think changing those variables might have an impact?
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10-30kW? How much of that reaches the ground? Could this be at all used for night time solar? I "love" the idea of distopian big eye casting a searchlight over the earth...
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I mean, sure it needs to be regulated but I've read other articles about this technology saying that the primary use would be for search and rescue operations where time is critical and having a big light over an area is going to massively improve chances of rescue. Surely that's a good thing?
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No, they don't. Sunlight on a 10m x 10m surface is the equivalent of about 10 million candela. The brightest search and rescue flares reach about 90k candela. That doesn't make this practical, but getting the math wrong only hurts your own argument.
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No it couldn't. Flares are a thing that already exists and are capable of providing more light than these could, at fractions if the cost
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What? There's nothing fundamentally limiting you from focusing sunlight to a spot that can fry people. There's a practical limit based on the aperture size of the collector, but that's not a fundamental principle of visible light.
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Oh sure my phone does it also has a built in emergency parachute. Wait what yours doesn't? What kind of phone do you have it must be really old.
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I agree, and that's part of why I'd question the practicality (though said 10m x 10m reflector would have an effective power of 10-30kW, so it's not exactly practical to carry a battery and light that size on e.g. a search helicopter). Of course, the use isn't to see where you're going, but to search large areas as quickly as possible (probably…
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Yeah but a torch could also do that. I’ve previously seen claims this type of thing could be used to grow crops in winter or generate power from ground based solar panels at night… There are easier ways to see where you’re going in the dark than to launch giant mirrors into space.
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While I have other questions about the practicality of the system, I think you're underestimating just how many orders of magnitude human vision adjusts to. For example, humans can navigate and locate themselves just fine under full moonlight, but that full moonlight is only about 1/100000 the intensity of sunlight at high noon. Even 0.01% of…