@sundogplanets Ok, back of the napkin-style math time. According to NASA, the moon's surface area is roughly (rounded up) 40×10^6 km², or 40×10^12m². These sattelites are 18m×18m or roughly (rounded up) 400m^2. The moon only shows us half of it's surface area, which is half-illuminated on average (the actual amount of light we receive from the moon is a bit less than that due to the moon being present for less of the night when nearer to a full moon, but I'll ignore that for now). So we've got 40e12/40e1/2/2 or 2.5e10, unitless. If we assume the moon reflects 20% as well as those mirrors (this is generous towards the mirrors), we end up with 5e9, or five billion. That's approximately the amount of these mirrors we'd need to build to reflect as much light back to the earth as the moon. Due to the very approximate nature of these only the order of magnitude really matters, but it is still a ridiculous amount and not worth it. After all, adding a second moon to power solar panels would probably not give ROI within the lifespan of the sun.

What are they even trying to do???