noisevault on Nostr: The biggest reason is line of sight. Calling someone on the sphere of the earth ...

The biggest reason is line of sight. Calling someone on the sphere of the earth requires more antennas because of both the curve of the earth and obstacles. The moon has very clear line of sight from the earth generally. But even the moon could be on the other side of the earth in which case we could only make the call from a relay antenna on the other side as well. So essentially the same thing.