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Minutes, four miles a second. this is a minute or minute and a half every two or three days. the other thing is they're operating about 2 or 300 miles above the earth. they're not 23,000 miles above the equator. they're fast moving and we don't exactly know which satellite this came from, but the problem is -- this is 80 feet long and they're much larger than a shipping container. we just don't know. >> we just don't know. but they found something. tim, before you go, final question for you. would these things have been spotted by the human eye or do you have computer programs to figure out oh...

It goes at 2,000 miles a second. martha: it can weigh 5 trillion-tons, which is just hard to wrap your britain around. >> the sun is so big that the numbers are hard to even fathom. the thing you really need to understand is when you're looking at the sun there the sun is a hundred times as wide as the earth. our entire planet to fit into one of those little curleyques in that picture. the amount of energy and power that is coming at is is tremendous. it's invisible to the naked eye but you can see it through the telescopes. >> what do you think in terms of black outs and the 4th of july, what...

This is part of that. what it allows private industry to get access to space, develop their own space stations innovate and make money in space the way nasa is not chartered to do. jon: kind of interesting private american company that the nation of north korea has not on able to do get a rocket into earth orbit. the challenge though is still to come when you get this ship close to the space station. tell us about that. >> right. rendezvous is one of the trickiest maneuvers in space bring together two spacecraft going file miles a second, 17,500 miles an hour and have them in formation. we did...