‘expert’ Neil Tyson says that the space junk orbiting the earth is getting worse and worse and if it continues could prevent future space travel. Hmm, I’m no expert, but it seems logical that if the junk is as thick as he says, it could shield the earth from the suns rays. Wouldn’t that cause real global ‘cooling’ Just asking. reduce the sunlight from
The sun is in the firmament 
"We have never left low earth orbit " barack obama 
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