3 ms·

So antimatter warps space in opposite way that matter does? Then you’d probably then need a negative-Earth-mass amount to counteract the depth of the earth-mass

by jp555 8y ago

So antimatter warps space in opposite way that matter does? Then you’d probably then need a negative-Earth-mass amount to counteract the depth of the earth-mass caused gravity-well we’re in. The antimatter mass equal to our planet is a lot of antimatter. Rockets, even antimatter powered ones, seem a lot better way out of Earth’s well.

Jyaif 8y ago
> Then you’d probably then need a negative-Earth-mass amount Assuming antiparticles are "repulsed" by earth's gravity, 1.01kg of antimatter would be enough to take 1kg of matter to space.
- Pxtl 8y ago
  The trick would be to attach them together with causing a nuclear explosion.
  - louthy 8y ago
    Oh the humanity!
- jp555 8y ago
  but wouldn’t the 1.01kg of antimatter have an “inverted gravity well” that propogates in all directions, sitting at the bottom of Earth’s much much larger gravity well? I mean I’m looking at gravity in that it isn’t like electromagnetism; propagating waves of energy through space. Gravity is the bending of space itself; mass’s impression. But maybe I’m using the wrong/incomplete model of gravity here
singingboyo 8y ago
Do you need mass equal to earth, or mass slightly greater than whatever you're launching? (Alternatively, does antimatter experience the opposite force of the same mass of regular matter, or is it something else?) If antimatter has negative mass in the context of the gravitational equation (F = Gm_1m_2/r^2) then you just need more antimatter than matter (by mass). Of course, that also means general relativity is incomplete. That's not to say launching/lifting something on an antimatter platform would be practical anyway. There'd be issues around how you keep the platform and payload together, let alone the difficulty of constructing an antimatter platform in the first place...

3 ms·

So antimatter warps space in opposite way that matter does? Then you’d probably then need a negative-Earth-mass amount to counteract the depth of the earth-mass

by jp555 8y ago

Jyaif 8y ago
> Then you’d probably then need a negative-Earth-mass amount Assuming antiparticles are "repulsed" by earth's gravity, 1.01kg of antimatter would be enough to take 1kg of matter to space.
- Pxtl 8y ago
  The trick would be to attach them together with causing a nuclear explosion.
  - louthy 8y ago
    Oh the humanity!
- jp555 8y ago
  but wouldn’t the 1.01kg of antimatter have an “inverted gravity well” that propogates in all directions, sitting at the bottom of Earth’s much much larger gravity well? I mean I’m looking at gravity in that it isn’t like electromagnetism; propagating waves of energy through space. Gravity is the bending of space itself; mass’s impression. But maybe I’m using the wrong/incomplete model of gravity here
singingboyo 8y ago
Do you need mass equal to earth, or mass slightly greater than whatever you're launching? (Alternatively, does antimatter experience the opposite force of the same mass of regular matter, or is it something else?) If antimatter has negative mass in the context of the gravitational equation (F = Gm_1m_2/r^2) then you just need more antimatter than matter (by mass). Of course, that also means general relativity is incomplete. That's not to say launching/lifting something on an antimatter platform would be practical anyway. There'd be issues around how you keep the platform and payload together, let alone the difficulty of constructing an antimatter platform in the first place...