Not signed in (Sign In)
  1.  (8612.21)
    How to counteract gravity?

  2.  (8612.22)
    Yes, I admit my understanding of gravity is not the greatest, but learning things later in life keeps things interesting.

    Thanks for all the books @oddbill. I'll watch the videos now.

    This pic is pretty amazing, check it out.

    @James Cunningham :)

    @Rootfireember Looking into that. ;)

    @Cat Vincent HEHEHE. Probably the best idea.
    • CommentAuthor256
    • CommentTimeJul 22nd 2010
    Theoretically, I suppose that there could be spots that are far enough away from anything to be unaffected by gravity...

    No. The strength of gravitational pull of an object reduces rapidly with distance, but it never goes to zero. (You can think of it mathematically; however large your "x" is, "1/x" will never = 0 ). For this reason, all matter in the universe has some influence on every other bit of matter and there is always some combination of gravitational pull on you wherever you are.
    • CommentAuthorSteadyUP
    • CommentTimeJul 22nd 2010
    From my admittedly amateur perspective, I do like to think that there could still be something to the big crunch, if only because a model of the universe that involves an end point just seems counterintuitive to me. As others have said, there doesn't seem to be enough known matter to reverse the rate of expansion we're observing, but there's a lot we don't know yet. There's generally understood to be a metric shit-ton of dark matter out there that could be affecting space in ways that aren't yet clear to us; also, there are some models of the universe that suggest it may be doing this - even though it seems to be spreading out, it may already be crunching via some other dimension, and thus, eternally recurring.
      CommentAuthorcity creed
    • CommentTimeJul 22nd 2010
    Last time I had to do something like that, I used an XT-87 Gravity Nullifier.

    The XT-87 is a useless piece of garbage. I tried to use one to levitate the laundry off the floor of my room, but it ended up collapsing into an event horizon - which sucked. I am still missing socks! Dark forces, best left unmeddled with etc etc.

    I strongly advise everyone not to buy anything from the XT range of Gravity Management Devices as it is obvious exploitative quackery on a par with so-called "magnets".

    There was some vibration, but I compensated with a weird magic stone thing I picked up from a shop in Glasgow.

    This bit is true though. Glaswegian stones = no tremors.
    • CommentAuthorpurvision
    • CommentTimeJul 22nd 2010
    Theoretically, what about an orb of anti-matter of sufficient size placed in the middle of said planet? Y'know, not touching any of the planet around it somehow...
  3.  (8612.27)
    @purvision Antimatter is thought to exert a normal, attractive gravitational pull, so the majority of physicists would say no.
    • CommentTimeJul 22nd 2010
    Thankyou Whitechapel, for making me learn!
    • CommentTimeJul 23rd 2010
    @purvision What Skylar said. Antimatter does not have negative gravity. Or even negative energy, necessarily... that is the purview of virtual particles, which are different from antiparticles, and can have negative mass.

    (Fortuitous time for this discussion... I just finished reading Brief History of Time this morning and got about a third of the way through Einstein's book on relativity tonight on the bus.)