162 views

### Why do people suspect antimatter falls upward? [duplicate]

Antimatter is similar to ordinary matter except they have the opposite charge, i like to know why this difference in their spin would affect their motion in the curvature of our 4-dimensional ...
63 views

### General Relativity and antimatter: Would antigravity of antimatter really disprove GR? [duplicate]

I understand that this may be a naive question but my understanding is that GR predicts that antiparticles should be affected by gravity just as regular matter is. But does GR discuss how a massive (...
47 views

### How does an antiparticle respond to a gravitational field? [duplicate]

A related Wikipedia page provided a little overview. However, here's the question: If an anti-particle acquire a negative mass $m$ in QFT, doesn't $F=ma$ indicate that the anti-particle will ...
2k views

### What is anti-matter?

Matter-- I guess I know what it is ;) somehow, at least intuitively. So, I can feel it in terms of the weight when picking something up. It may be explained by gravity which is itself is defined by ...
4k views

### Gravity, matter vs antimatter

I have a simple question regarding matter-antimatter gravity interaction. Consider the following though experiment: If we imagine a mass $m$ and an antimass $m^-$, revolving around a large mass $M$ ...
1k views

### Why would Antimatter behave differently via Gravity? [closed]

Confinement of antihydrogen might help provide a future answer. http://arxiv.org/abs/1104.4982
705 views

### Are there models/simulations of antigravitational antimatter-galaxies?

In the comments to another question's answer, I started wondering: Assuming antimatter possessed negative gravitational mass§ (which is not proven impossible to date, though deemed unlikely), ...
1k views

### Anti-matter repelled by gravity - is it a serious hypothesis? [duplicate]

Possible Duplicate: Why would Antimatter behave differently via Gravity? Regarding the following statement in this article: Most important of these is whether ordinary gravity attracts or ...
537 views

### How do matter and antimatter interact gravitationally?

Me and my brother were watching television tonight, and he asked me a question that was somewhat along the lines of this: What would happen if the Earth was made of matter, and the moon was made of ...