yes, but if light and therefore radiation would possibly have mass, would not nearly all such emmissions throughout time be dark from our...
take as little as possible and get your materials from space, moon, asteroids etc. how much would it cost to get 10 tons of rock to the moon versus...
with regard to the theory of dark matter, it seems to me that common sense would be to assume that we can only detect a small amount of the substance...
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