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500km orbit. It will be in the dark most of the night. They may lose some early evening/morning observation quality but it shouldn't be that bad for the rest of it.

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Now multiply that by the 100 satellites the company plans to launch. Now multiply _that_ by the other companies that want to launch satellites.

You'll have 100 dark satellites at night, so what? These birds are visible only for an hour or so after sundown and before sunrise.

I think you're forgetting that astronomers care about wavelengths of light other than visible light — that is a very, very narrow range of the spectrum of radiation.

In the infrared, for example, every satellite looks like a blazing star. In the radio spectrum, every satellite that transmits signals in this band looks hundreds of thousands of times brighter than a star.

Now perhaps, but the plan is for plenty more.

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