SpaceX Pulled It Off!

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  • tonyb
    tonyb Posts: 33,005
    Maybe patience is in order. History tells us every so often mankind makes a leap forward. When you think about it, less than 70 years we went from horse and buggy to space travel. That's huge...I would expect within the next 20-30 years a big breakthrough will come about. If we don't kill each other first.

    I don't see a reason to even go to Mars. It's not compatible to the human species long term. Maybe we can get a better understanding of what long space travel entails though.

    Light speed travel isn't enough, the key is bending space and time for long distance travel imho.
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  • mhardy6647
    mhardy6647 Posts: 33,980
    voltz wrote: »
    ...

    but I honestly think all we can ever do will be in our own solar system.... as the closes sun to us alpha Centauri is 2.5 light years away and at that speed even light speed travel is not fast enough...you go there come back and you hardly aged but everyone you even knew or that knew you left are dead and buried for hundreds of years...

    I totally agree with you; sadly, the amount of energy it would require to travel at relativistic velocities would be unattainable for the amount of mass one would want to send off into the beyond. Einstein's equation E = mc^2 cuts both ways. The mass of an object increases as its velocity increases, and... at the speed of light (c), mass becomes infinite.

    The time dilation thing isn't quite that bad. If one could attain "c" and travel to Proxima Centauri -- which is 4.234 light years, or 40.14 trillion km from earth < I googled it ;- ) > -- the round trip would take ca. 9 years from the perspective of an observer on earth. The travelers would age... well, very little if any. '

    Not a big problem for 'close' stars; big problem for far-away objects, though.

    Dr. Brian May, who day job used to be as a guitarist for Queen, wrote a great song on the topic ('39).
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  • voltz
    voltz Posts: 5,384
    OK, so what's the speed of dark?

    If your in a spaceship traveling at the speed of light and you turn you headlights on, will they work.

    Someone sent me a postcard picture of the earth.
    On the back it said, "Wish you were here."

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  • mhardy6647
    mhardy6647 Posts: 33,980
    "I went to a restaurant that serves 'breakfast at any time'. So I ordered French Toast during the Renaissance..."
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  • jvc
    jvc Posts: 41
    bravo Elon Musk.
    wonder what audio equipment he listens too ?
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  • mhardy6647
    mhardy6647 Posts: 33,980
    Probably battery powered...
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  • jvc
    jvc Posts: 41
    that is funny ! good one.
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